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Ler, P., Mak, J. K. L., Reynolds, C. A., Ploner, A., Pedersen, N. L., Jylhävä, J., . . . Karlsson, I. K. (2025). A Longitudinal Study of the Bidirectional Temporal Dynamics Between Body Mass Index and Biological Aging. Journal of Cachexia, Sarcopenia and Muscle, 16(3), Article ID e13824.
Open this publication in new window or tab >>A Longitudinal Study of the Bidirectional Temporal Dynamics Between Body Mass Index and Biological Aging
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2025 (English)In: Journal of Cachexia, Sarcopenia and Muscle, ISSN 2190-5991, E-ISSN 2190-6009, Vol. 16, no 3, article id e13824Article in journal (Refereed) Published
Abstract [en]

Background: Obesity and aging share biological processes, but their relationship remains unclear, especially in late life. Understanding how body mass index (BMI) and biological aging influence each other can guide strategies to reduce age- and obesity-related health risks. We examined the bidirectional, longitudinal association between changes in BMI and biological aging, measured by frailty index (FI) and functional aging index (FAI), across late life.

Methods: This longitudinal cohort study used data from the Swedish Twin Registry substudies, GENDER, OCTO-Twin and SATSA, collected via in-person assessments from 1986 to 2014 at 2- to 4-year intervals. We analysed 6216–6512 evaluations from 1902 to 1976 Swedish twins. Dual change score models were applied to assess the bidirectional, longitudinal association between BMI and FI or FAI from ages 60.0–91.9. FI measured physiological aging, while FAI assessed functional aging through a composite score of functional abilities.

Results: At first measurement, mean age was 74 ± 8, and 41% were males. BMI–FI relationship was bidirectional (p value ≤ 0.001): Higher BMI predicted a greater increase in FI over time (coupling effect [γ] = 0.86, 95% confidence interval [CI] = 0.65–1.06, p value ≤ 0.001), and higher FI predicted steeper decline in BMI (γ = −0.04, 95% CI = −0.05 to −0.03, p value ≤ 0.001). When including coupling from FI, BMI showed a nonlinear trajectory with a mean intercept of 26.32 kg/m2 (95% CI = 25.76–26.88), declining more rapidly after age 75. When including BMI coupling, FI increased from a mean intercept of 7.91% (95% CI = 6.41–9.42), with steeper growth from ages 60–75. BMI–FAI relationship was unidirectional (p value ≤ 0.001): Higher FAI predicted a steeper BMI decline (γ = −0.02, 95% CI = −0.02 to −0.01, p value ≤ 0.001). By including FAI coupling, BMI had a mean intercept of 26.10 kg/m2 (95% CI = 25.47–26.74), declining rapidly after age 75. FAI increased exponentially from a mean intercept of 36.49 (95% CI = 34.54–38.43).

Conclusions: Higher BMI predicted a steeper increase in FI, substantiating the hypothesis that obesity accelerates biological aging. Higher biological aging, measured as FI and FAI, drove a steeper BMI decline in late life, signalling that late-life weight loss may result from accelerated aging. Higher BMI may accelerate aspects of the aging process, and the aging process, in turn, accelerates late-life BMI decline, necessitating an integrated approach to manage both obesity and unintentional weight loss among older adults.

Place, publisher, year, edition, pages
John Wiley & Sons, 2025
Keywords
biological aging, body mass index, dual change score, frailty index, obesity, trajectory
National Category
Gerontology, specialising in Medical and Health Sciences Geriatrics Public Health, Global Health and Social Medicine
Research subject
Wellbeing in long-term health problems (WeLHP)
Identifiers
urn:nbn:se:his:diva-25159 (URN)10.1002/jcsm.13824 (DOI)001522046100020 ()40342213 (PubMedID)2-s2.0-105004687533 (Scopus ID)
Funder
Forte, Swedish Research Council for Health, Working Life and Welfare, 2022-00672Karolinska InstituteLoo och Hans Ostermans Stiftelse för medicinsk forskning, 2022-01222Loo och Hans Ostermans Stiftelse för medicinsk forskning, 2023-01855Loo och Hans Ostermans Stiftelse för medicinsk forskning, 2024-02197Foundation for Geriatric Diseases at Karolinska Institutet, 2022-01296Foundation for Geriatric Diseases at Karolinska Institutet, 2023-01854Foundation for Geriatric Diseases at Karolinska Institutet, 2024-02116NIH (National Institutes of Health), R01AG060470NIH (National Institutes of Health), AG059329NIH (National Institutes of Health), R01AG037985NIH (National Institutes of Health), R01AG081248NIH (National Institutes of Health), R01AG089666Swedish Research Council, 2016–03081Swedish Research CouncilEdith och Erik Fernströms Stiftelse för medicinsk forskningNIH (National Institutes of Health), AG04563NIH (National Institutes of Health), AG10175Forte, Swedish Research Council for Health, Working Life and Welfare, 97:0147:1BForte, Swedish Research Council for Health, Working Life and Welfare, 2009-0795Swedish Research Council, 825-2007-7460Swedish Research Council, 825-2009-6141NIH (National Institutes of Health), R01AG08861Axel and Margaret Ax:son Johnson FoundationVårdal FoundationThe Karolinska Institutet's Research Foundation, 2022-01718
Note

CC BY 4.0

© 2025 The Author(s). Journal of Cachexia, Sarcopenia and Muscle published by Wiley Periodicals LLC.

Correspondence Address: P. Ler; Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Solna, Sweden; email: peggy.ler@ki.se; I. Karlsson; Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Solna, Sweden; email: ida.karlsson@ki.se

This research was funded by the Swedish Research Council for Health, Working Life and Welfare (Forte; 2022-00672), the Strategic Research Program in Epidemiology (SFOepi) at Karolinska Institutet, Loo and Hans Osterman's Foundation (2022-01222, 2023-01855 and 2024-02197), the Foundation for Geriatric Diseases at Karolinska Institutet (2022-01296, 2023-01854 and 2024-02116), the National Institutes of Health (R01AG060470 and AG059329), the National Institute on Aging (R01AG037985, R01AG081248 and R01AG089666), the Swedish Research Council (Vetenskaprådet; 2016–03081), Erik och Edith Fernströms stiftelse för medicinsk forskning and Swedish National Research School of Aging and Health (SWEAH). The SATSA project received support from the NIH (Grants AG04563 and AG10175), the MacArthur Foundation Research Network on Successful Aging, the Swedish Research Council for Working Life and Social Research (97:0147:1B and 2009-0795) and the Swedish Research Council (825-2007-7460 and 825-2009-6141). Funding for the OCTO-Twin was provided by the NIH (R01AG08861). GENDER was funded by the MacArthur Foundation Research Network on Successful Aging, the Axel and Margaret Ax:son Johnson's Foundation, the Swedish Council for Social Research, the Swedish Foundation for Health Care Sciences and Allergy Research and the Karolinska Institutet's Research Foundation (2022-01718). The research funders did not contribute to the development of study design, analysis, interpretation of results and manuscript writing.

Available from: 2025-05-22 Created: 2025-05-22 Last updated: 2025-09-29Bibliographically approved
Ojalehto Lindfors, E., De Oliveira, T. L., Reynolds, C. A., Zhan, Y., Dahl Aslan, A. K., Jylhävä, J., . . . Karlsson, I. K. (2025). Genetic influences, lifestyle and psychosocial aspects in relation to metabolically healthy obesity and conversion to a metabolically unhealthy state. Diabetes, obesity and metabolism, 27(1), 207-214
Open this publication in new window or tab >>Genetic influences, lifestyle and psychosocial aspects in relation to metabolically healthy obesity and conversion to a metabolically unhealthy state
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2025 (English)In: Diabetes, obesity and metabolism, ISSN 1462-8902, E-ISSN 1463-1326, Vol. 27, no 1, p. 207-214Article in journal (Refereed) Published
Abstract [en]

Aims: About 10%–30% of individuals with obesity are metabolically healthy, but the specific characteristics of the metabolically healthy obesity (MHO) phenotype remain unclear. We aimed to examine how physical activity, education, depressive symptoms and genetic predisposition to obesity differ between individuals with MHO and those with metabolically unhealthy obesity (MUO), and whether these factors predict stability in MHO or conversion to a metabolically unhealthy state.

Materials and Methods: We retrieved data on 9809 individuals with obesity from the Health and Retirement Study collected between 2006 and 2016. We compared how physical activity, education, depressive symptoms and a polygenic score for higher body mass index (BMI) (PGSBMI) differed cross-sectionally between MHO and MUO using logistic regression. We then examined if the same factors predict conversion to a metabolically unhealthy state over 4 years in individuals with MHO.

Results: Individuals with MHO had higher physical activity (odds ratio [OR] = 0.81), higher education (OR = 0.83) and lower depressive symptoms (OR = 1.14) compared to those with MUO but did not differ in the PGSBMI. The associations were slightly attenuated in mutually adjusted models. None of the factors were associated with conversion from MHO to a metabolically unhealthy state. However, a higher PGSBMI indicated 24% lower risk of conversion to a metabolically unhealthy state (p = 0.07).

Conclusions: Physical activity, education and depressive symptoms differed between MHO and MUO, even when mutually adjusted for, but did not predict conversion from a metabolically healthy to unhealthy state. Although not statistically significant, the results indicated that those with genetically predicted high BMI are more likely to maintain MHO and not convert to a metabolically unhealthy state.

Place, publisher, year, edition, pages
John Wiley & Sons, 2025
Keywords
body mass index, metabolically healthy obesity, obesity, population study
National Category
Geriatrics Public Health, Global Health and Social Medicine Nutrition and Dietetics Gerontology, specialising in Medical and Health Sciences Endocrinology and Diabetes
Research subject
Wellbeing in long-term health problems (WeLHP)
Identifiers
urn:nbn:se:his:diva-24608 (URN)10.1111/dom.16004 (DOI)001328566200001 ()39382007 (PubMedID)2-s2.0-85205840872 (Scopus ID)
Funder
Karolinska InstituteForte, Swedish Research Council for Health, Working Life and Welfare, 2022-00672Loo och Hans Ostermans Stiftelse för medicinsk forskning, 2022-01222Loo och Hans Ostermans Stiftelse för medicinsk forskning, 2023-01855Loo och Hans Ostermans Stiftelse för medicinsk forskning, 2024-02197Foundation for Geriatric Diseases at Karolinska Institutet, 2022-01296Foundation for Geriatric Diseases at Karolinska Institutet, 2023-01854Foundation for Geriatric Diseases at Karolinska Institutet, 2024-02197The Karolinska Institutet's Research Foundation, 2022-01718
Note

CC BY-NC 4.0

First published: 09 October 2024

Correspondence: Elsa Ojalehto Lindfors, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, SE-1177 Stockholm, Sweden. Email: elsa.ojalehto@ki.se

Funding information: Strategic Research Program in Epidemiology (SFOepi) at Karolinska Institutet; The Swedish Research Council for Health, Working Life and Welfare, Grant/Award Number: 2022-00672; Loo and Hans Osterman's Foundation, Grant/Award Numbers: 2022-01222, 2023-01855, 2024-02197; Foundation for Geriatric Diseases at Karolinska Institutet, Grant/Award Numbers: 2022-01296, 2023-01854, 2024-02197; Karolinska Institutet's Research Foundation, Grant/Award Number: 2022-01718

Available from: 2024-10-10 Created: 2024-10-10 Last updated: 2025-09-29Bibliographically approved
Berglund Kristiansson, E., Åberg, C., Dahl Aslan, A. K. & Berglund, M. (2025). Older persons’ experiences of one-to-one in-home support for their digital needs: A qualitative study of a Digital Coach service.
Open this publication in new window or tab >>Older persons’ experiences of one-to-one in-home support for their digital needs: A qualitative study of a Digital Coach service
2025 (English)In: Article in journal (Refereed) Epub ahead of print
Abstract [en]

Background

Older persons (those 65 years of age and older) have the lowest digital competence and are thus at an increased risk of exclusion from a digitalizing society. To bridge this digital divide, several Swedish municipalities have introduced a service called Digital Coach (DC), where older persons can request in-home support for their digital needs. Little is known about older persons’ experiences of this unique service.

Objective

To study older persons’ experiences of one-to-one in-home support, with their digital needs, through the DC service.

Methods

A qualitative study was conducted through interviews, and the data were analysed using qualitative content analysis following the approach of Graneheim and Lundman.

Results

The older persons (n = 14) expressed awareness of the importance of digital competence to keep up with the times to avoid exclusion and vulnerability. They requested support to become part of a digital society. The DC service was experienced as providing respectful support at home, which is considered a calm, safe environment. They expressed that the support made them feel valued and increased opportunities for independence and social participation.

Conclusions

Older persons found one-to-one in-home support to be the optimal form of support for their digital needs. The support gave them the best conditions to achieve digital competence, and without the support, would have felt stranded. Efforts to support older persons’ digital competence should be based on the older persons’ own digital needs and be provided in their home.

Place, publisher, year, edition, pages
Sage Publications, 2025
Keywords
Older person, one-to-one support, in-home, digital competence, qualitative study
National Category
Public Health, Global Health and Social Medicine Nursing
Research subject
Research on Citizen Centered Health, University of Skövde (Reacch US); Wellbeing in long-term health problems (WeLHP)
Identifiers
urn:nbn:se:his:diva-25896 (URN)10.1177/20552076251384828 (DOI)001586287400001 ()41050622 (PubMedID)2-s2.0-105017541383 (Scopus ID)
Funder
Swedish Research Council, DNR 2022-06348Region Västra Götaland, Skaraborgsinstitutet 21/1025
Note

CC BY 4.0

First published online October 3, 2025

The final two named authors should both be counted as last authors.

Corresponding author: Elisabeth Berglund Kristiansson, School of Health Sciences, University of Skövde, SE 541 28 Skövde, Sweden. Email: elisabeth.berglund.kristiansson@his.se

Warm thanks to the older persons who participated in this study, the Digital Coach (DC), and the municipality for everyone’s trust and making this study possible. This work was conducted at the University of Skövde, Sweden, and in collaboration with and supported by the infrastructure of the Swedish Research School in Integrated Care for Future Teachers (SHIFT CARE), funded by the Swedish Research Council (DNR 2022-06348).

The authors disclosed receipt of the following financial supportfor the research, authorship, and/or publication of this article: The authors acknowledge Skaraborgsinstitutet (the Skaraborg Institute for Research and Development), Skövde, Sweden,who contributed funds to conduct this study (grant number 21/1025).

Available from: 2025-10-06 Created: 2025-10-06 Last updated: 2025-10-17Bibliographically approved
Ler, P., Jylhävä, J., Hägg, S., Finkel, D., Dahl Aslan, A. K., Ploner, A. & Karlsson, I. K. (2025). The mediating role of epigenetic ageing in the nonlinear association between body mass index and survival: a prospective cohort analysis of the US Health and Retirement Study. EBioMedicine, 119(September 2025), Article ID 105883.
Open this publication in new window or tab >>The mediating role of epigenetic ageing in the nonlinear association between body mass index and survival: a prospective cohort analysis of the US Health and Retirement Study
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2025 (English)In: EBioMedicine, E-ISSN 2352-3964, Vol. 119, no September 2025, article id 105883Article in journal (Refereed) Published
Abstract [en]

Background: The role of biological ageing in the association between body mass index (BMI) and survival remains unclear. We examined whether epigenetic age acceleration (EAA), a biomarker of biological ageing, mediates the BMI-survival association. Methods: We analysed data from 3840 participants (aged 51–100) in the 2016 US Health and Retirement Study, with survival information through 2020. Mediation analyses were performed using linear regression and Gompertz proportional hazards models with restricted cubic splines, adjusting for age, sex, ethnicity/race, smoking, education, and metabolic health. Average direct effects (ADE) of BMI and average causal mediation effects of EAA (HannumAgeAcc, PhenoAgeAcc, GrimAgeAcc, and DunedinPace) on survival time were estimated with 95% confidence intervals (CI). Findings: Associations between BMI, EAA, and survival were nonlinear: high and low BMIs were associated with higher EAA and reduced survival time. ADEs of high BMI (35 kg/m2 versus 27 kg/m2) were not statistically significant (reduced survival time: 1.21–1.58 years) but significant for low BMI (19 kg/m2 versus 27 kg/m2, reduced survival time: 5.60–6.38 years). For high BMI, mediation was significant through all EAAs, with reduced survival time ranging from 0.28 to 0.71 years, accounting for 15–37% of total effects. For low BMI, mediation was statistically significant through HannumAgeAcc (reduced survival time: 0.44, CI: 0.08–0.86) and GrimAgeAcc (reduced survival time: 0.73, CI: 0.15–1.38), accounting for 7–11% of total effects. Interpretation: EAA partially mediated the high BMI-survival association, supporting the mediating role of accelerated ageing in the obesity-survival relationship. Mediation through EAA in the low BMI-survival association was weaker, indicating that alternative mechanisms, other than accelerated ageing, may dominate. Funding: Forte, Vetenskaprådet, SFOepi, Karolinska Institutet's Research Foundation, Loo and Hans Osterman Foundation, the Foundation for Geriatric Diseases at Karolinska Institutet. 

Place, publisher, year, edition, pages
Elsevier, 2025
Keywords
Biological age, Body mass index, Epigenetic age, Mediation analysis, Mortality, Obesity
National Category
Public Health, Global Health and Social Medicine Geriatrics
Research subject
Wellbeing in long-term health problems (WeLHP)
Identifiers
urn:nbn:se:his:diva-25762 (URN)10.1016/j.ebiom.2025.105883 (DOI)001564990100001 ()40819634 (PubMedID)2-s2.0-105013653740 (Scopus ID)
Funder
Forte, Swedish Research Council for Health, Working Life and Welfare, 2022-00672The Karolinska Institutet's Research Foundation, 2022-01718Loo och Hans Ostermans Stiftelse för medicinsk forskning, 2022-01222Loo och Hans Ostermans Stiftelse för medicinsk forskning, 2023-01855Loo och Hans Ostermans Stiftelse för medicinsk forskning, 2024-02197Foundation for Geriatric Diseases at Karolinska Institutet, 2022-01296Foundation for Geriatric Diseases at Karolinska Institutet, 2023-01854Foundation for Geriatric Diseases at Karolinska Institutet, 2024-02116Swedish Research Council, 2016–03081
Note

CC BY 4.0

© 2025 The Author(s)

Correspondence Address: P. Ler; Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Solna, Nobels väg 12A, 171 65, Sweden; email: peggy.ler@ki.se; I.K. Karlsson; Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Solna, Nobels väg 12A, 171 65, Sweden; email: ida.karlsson@ki.se

This research was funded by the Swedish Research Council for Health, Working Life and Welfare (Forte; 2022-00672); the Strategic Research Program in Epidemiology (SFOepi) at Karolinska Institutet, Karolinska Institutet’s Research Foundation (2022-01718); Loo and Hans Osterman Foundation (2022-01222, 2023-01855, 2024-02197); the Foundation for Geriatric Diseases at Karolinska Institutet (2022-01296, 2023-01854, 2024-02116); and the Swedish Research Council (Vetenskaprådet; 2016–03081).

Available from: 2025-08-28 Created: 2025-08-28 Last updated: 2025-09-29Bibliographically approved
Berglund Kristiansson, E., Dahl Aslan, A. K., Berglund, M. & Åberg, C. (2024). A qualitative study of older persons’ experiences of getting individual support with digital needs in the context of home ID 281. In: Axel Wolf; Joakim Öhlén (Ed.), The first Global Conference on Person-Centred Care: Knowledge(s) and Innovations for Health in Changing Societies. Paper presented at First Global Conference on Person-Centred Care (GCPCC), Gothenburg, Sweden, 13th–16th May, 2024 (pp. 216-216). University of Gothenburg Centre for Person-Centred Care, Article ID 86.
Open this publication in new window or tab >>A qualitative study of older persons’ experiences of getting individual support with digital needs in the context of home ID 281
2024 (English)In: The first Global Conference on Person-Centred Care: Knowledge(s) and Innovations for Health in Changing Societies / [ed] Axel Wolf; Joakim Öhlén, University of Gothenburg Centre for Person-Centred Care , 2024, p. 216-216, article id 86Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

Background: Digitalization is seen as a necessity to manage the increasing burden on the health care system and is accordingly considered an important tool in the transformation to integrated care (Swedish Nära vård). However, when health care is digitalized older persons are at increased risk of being marginalized and dependent on others due to their generally lower digital competence. To address this, several Swedish municipalities offer individual support to older persons in their own home, a service called Digital Coach (DC). As this service is new, the aim is to describe older persons’ experiences of getting individual support with digital needs in the context of home. Method: Semi-structured interviews (n=14) were conducted with older persons who have had DC support in their home. The focus was on older persons’ experiences of the support. Data was analyzed with qualitative content analysis. Results, preliminary: The overall theme, to be a valued person in the digital society, represents a feeling of being taken seriously and worth investing resources in to gain access to society. Three categories emerged: (1) The need to keep up with the times which means to understand and navigate the new digital landscape with the opportunity for independence and participation, (2) Support and respect in the learning situation, is crucial for feeling comfortable to expose insufficient knowledge, and (3) Increased digital competence empowers autonomy and is manifested as the ability to handle the digital tools and services by your own creates a feeling of joy and satisfaction and increases the opportunity to participate in both social and community activities. Conclusion: The result shows that individual support with digital needs in the context of home increase digital competence in older persons and create feelings of being valued and included in the digital society, which can extend to integrated person-centered care.

Place, publisher, year, edition, pages
University of Gothenburg Centre for Person-Centred Care, 2024
Series
Gothenburg Series in Person-Centred Care
National Category
Public Health, Global Health and Social Medicine
Research subject
Research on Citizen Centered Health, University of Skövde (Reacch US); Wellbeing in long-term health problems (WeLHP)
Identifiers
urn:nbn:se:his:diva-23898 (URN)978-91-531-0670-8 (ISBN)
Conference
First Global Conference on Person-Centred Care (GCPCC), Gothenburg, Sweden, 13th–16th May, 2024
Available from: 2024-06-04 Created: 2024-06-04 Last updated: 2025-09-29Bibliographically approved
Mårtensson, S. & Dahl Aslan, A. K. (2024). Activity-guide – social support efforts aimed at reducing the involuntary loneliness of elderly persons ID 296. In: Axel Wolf; Joakim Öhlén (Ed.), The first Global Conference on Person-Centred Care: Knowledge(s) and Innovations for Health in Changing Societies. Paper presented at First Global Conference on Person-Centred Care (GCPCC), Gothenburg, Sweden, 13th–16th May, 2024 (pp. 205-206). University of Gothenburg Centre for Person-Centred Care, Article ID 74.
Open this publication in new window or tab >>Activity-guide – social support efforts aimed at reducing the involuntary loneliness of elderly persons ID 296
2024 (English)In: The first Global Conference on Person-Centred Care: Knowledge(s) and Innovations for Health in Changing Societies / [ed] Axel Wolf; Joakim Öhlén, University of Gothenburg Centre for Person-Centred Care , 2024, p. 205-206, article id 74Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

The function of an activity-guide is an innovative municipal collaborative support effort that fits well into the strategies for healthy ageing and person-centred care. The activity-guide mission is to be a support, a personal contact, for elderly who experience involuntary loneliness in daring to recommence or find new social contexts, such as physical, cultural or creative activities. Today we know that experienced involuntary loneliness over longer period of time not only affects the psychological well-being but also the physical health. Put into perspective, involuntary loneliness is refereed to be as strongly associated with premature death as smoking fifteen cigarettes a day. Simultaneously, we know that involuntary loneliness can be difficult to break by yourself, as perceived loneliness is often surrounded by feelings of shame. Fortunately, today there are good initiatives of collaborative support efforts to break the involuntary loneliness of elderly. One of these good initiatives is this collaborative project between Skövde Municipality and the University of Skövde where the aim is to contribute in development of the activity-guide function and collect data to evaluate the users’ perception and usefulness of the activity-guide function. The project is collecting both qualitative and quantitate data from elderly who have contact with the activity-guide. Preliminary data collected from individual-in-depth interviews with the elderly, shows that the activity-guide have a significant role in resuming or finding new social contexts. Concurrently, the preliminary results show that the elderly want more understanding and knowledge from healthcare providers about how involuntary loneliness affects their health and well-being. In the project, it is planned for focus-group interviews with the persons who are activity-guides in the municipalities that offer their residents this function. This projects knowledge can be used for a deeper understanding of what enables and prevents elderly person from daring to recommence or find new social contexts.

Place, publisher, year, edition, pages
University of Gothenburg Centre for Person-Centred Care, 2024
Series
Gothenburg Series in Person-Centred Care
National Category
Public Health, Global Health and Social Medicine
Research subject
Wellbeing in long-term health problems (WeLHP)
Identifiers
urn:nbn:se:his:diva-23942 (URN)978-91-531-0670-8 (ISBN)
Conference
First Global Conference on Person-Centred Care (GCPCC), Gothenburg, Sweden, 13th–16th May, 2024
Available from: 2024-06-14 Created: 2024-06-14 Last updated: 2025-09-29Bibliographically approved
Ler, P., Ojalehto, E., Zhan, Y., Finkel, D., Dahl Aslan, A. K. & Karlsson, I. K. (2024). Conversions between metabolically unhealthy and healthy obesity from midlife to late-life. International Journal of Obesity, 48, 433-436
Open this publication in new window or tab >>Conversions between metabolically unhealthy and healthy obesity from midlife to late-life
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2024 (English)In: International Journal of Obesity, ISSN 0307-0565, E-ISSN 1476-5497, Vol. 48, p. 433-436Article in journal (Refereed) Published
Abstract [en]

Introduction: Metabolically healthy obesity may be a transient phenotype, but studies with long follow-up, especially covering late-life, are lacking. We describe conversions between cross-categories of body mass index (BMI) and metabolic health in 786 Swedish twins with up to 27 years of follow-up, from midlife to late-life. Methods: Metabolic health was defined as the absence of metabolic syndrome (MetS). We first visualized conversions between BMI-metabolic health phenotypes in 100 individuals with measurements available at ages 50–64, 65–79, and ≥80. Next, we modeled conversion in metabolic health status by BMI category in the full sample using Cox proportional hazards regression. Results: The proportion of individuals with MetS and with overweight or obesity increased with age. However, one-fifth maintained a metabolically healthy overweight or obesity across all three age categories. Among those metabolically healthy at baseline, 59% converted to MetS during follow-up. Conversions occurred 56% more often among individuals with metabolically healthy obesity, but not overweight, compared to normal weight. Among those with MetS at baseline, 60% regained metabolic health during follow-up, with no difference between BMI categories. Conclusions: Conversions between metabolically healthy and unhealthy status occurred in both directions in all BMI categories. While conversions to MetS were more common among individuals with obesity, many individuals maintained or regained metabolic health during follow-up. 

Place, publisher, year, edition, pages
Springer Nature, 2024
National Category
Public Health, Global Health and Social Medicine Gerontology, specialising in Medical and Health Sciences
Research subject
Wellbeing in long-term health problems (WeLHP)
Identifiers
urn:nbn:se:his:diva-23473 (URN)10.1038/s41366-023-01425-y (DOI)001112290100002 ()38042933 (PubMedID)2-s2.0-85178490780 (Scopus ID)
Funder
Karolinska InstituteForte, Swedish Research Council for Health, Working Life and Welfare, 2018-01201Forte, Swedish Research Council for Health, Working Life and Welfare, 2022-00672Swedish Research Council, 2016-03081Karolinska Institute, 2022-01296Karolinska Institute, 2023-01854The Karolinska Institutet's Research Foundation, 2022-01718NIH (National Institutes of Health), R01 AG060470NIH (National Institutes of Health), AG059329NIH (National Institutes of Health), AG04563NIH (National Institutes of Health), AG10175Forte, Swedish Research Council for Health, Working Life and Welfare, 97:0147:1BForte, Swedish Research Council for Health, Working Life and Welfare, 2009-0795Swedish Research Council, 825-2007-7460Swedish Research Council, 825- 2009-6141Swedish Research Council, 2021-00180
Note

CC BY 4.0 DEED

© 2023, The Author(s).

Published: 02 December 2023

Brief communication

Correspondence Address: I.K. Karlsson; Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, 17177, Sweden; email: ida.karlsson@ki.se; CODEN: IJOBD

This work was supported by the Strategic Research Program in Epidemiology at Karolinska Institutet; the Swedish Research Council for Health, Working Life and Welfare (2018-01201 and 2022-00672); the Swedish Research Council (2016-03081); Loo and Hans Osterman Foundation for Medical Research (2022-01222 and 2023-01855); Foundation for Geriatric Diseases at Karolinska Institutet (2022-01296 and 2023-01854); Karolinska Institutet’s Research Foundation (2022-01718); and the National Institutes of Health (R01 AG060470 and AG059329). The funding sources had no involvement in the current work. SATSA was supported by the National Institutes of Health (NIH; grants AG04563 and AG10175), the MacArthur Foundation Research Network on Successful Aging, the Swedish Research Council for Working Life and Social Research (FAS; Grants 97:0147:1B, 2009-0795), and the Swedish Research Council (825-2007-7460 and 825-2009-6141). We acknowledge the Swedish Twin Registry for access to data. The Swedish Twin Registry is managed by Karolinska Institutet and receives funding through theSwedish Research Council under the grant no. 2021-00180.

Open access funding provided by Karolinska Institute.

Available from: 2023-12-14 Created: 2023-12-14 Last updated: 2025-09-29Bibliographically approved
Dahl Aslan, A. K. & Gellerstedt, M. (2024). Hälsosamt åldrande i det digitala samhället: En rapport om digitalisering, ensamhet och hälsa bland personer 55 år och äldre i Skövde kommun. Skövde: Högskolan i Skövde
Open this publication in new window or tab >>Hälsosamt åldrande i det digitala samhället: En rapport om digitalisering, ensamhet och hälsa bland personer 55 år och äldre i Skövde kommun
2024 (Swedish)Report (Other academic)
Abstract [sv]

Denna rapport innehåller en kartläggning av digitalisering, ensamhet och hälsa i Skövde kommun. Resultaten baseras på en enkät som skickats ut till 1000 invånare i Skövde kommun som är 55 år eller äldre. Enkäten har tagits fram i samverkan mellan Skövde kommun och Högskolan i Skövde. Rapporten vänder sig främst till politiker, beslutsfattare och handläggare som arbetar med frågor som berör digitalisering, ensamhet och hälsa. Andra målgrupper finns inom civilsamhälle, näringsliv och forskning.

Place, publisher, year, edition, pages
Skövde: Högskolan i Skövde, 2024. p. 20
National Category
Public Health, Global Health and Social Medicine Information Systems, Social aspects
Research subject
Wellbeing in long-term health problems (WeLHP); Research on Citizen Centered Health, University of Skövde (Reacch US)
Identifiers
urn:nbn:se:his:diva-25408 (URN)
Note

Författarna vill rikta ett stort tack till alla engagerade samarbetspartners i Skövde kommun. Tillsammans skapar vi möjlighet för att fler äldre ska få ett hälsosamt åldrande i Skövde kommun!

Anna Dahl Aslan & Martin Gellerstedt, Högskolan i Skövde, 15 November, 2024

Available from: 2025-07-01 Created: 2025-07-01 Last updated: 2025-11-07Bibliographically approved
Ler, P., Ploner, A., Finkel, D., Reynolds, C. A., Zhan, Y., Jylhävä, J., . . . Karlsson, I. K. (2024). Interplay of body mass index and metabolic syndrome: association with physiological age from midlife to late-life. GeroScience, 46(2), 2605-2617
Open this publication in new window or tab >>Interplay of body mass index and metabolic syndrome: association with physiological age from midlife to late-life
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2024 (English)In: GeroScience, ISSN 2509-2715, Vol. 46, no 2, p. 2605-2617Article in journal (Refereed) Published
Abstract [en]

Obesity and metabolic syndrome (MetS) share common pathophysiological characteristics with aging. To better understand their interplay, we examined how body mass index (BMI) and MetS jointly associate with physiological age, and if the associations changed from midlife to late-life. We used longitudinal data from 1,825 Swedish twins. Physiological age was measured as frailty index (FI) and functional aging index (FAI) and modeled independently in linear mixed-effects models adjusted for chronological age, sex, education, and smoking. We assessed curvilinear associations of BMI and chronological age with physiological age, and interactions between BMI, MetS, and chronological age. We found a significant three-way interaction between BMI, MetS, and chronological age on FI (p-interaction = 0·006), not FAI. Consequently, we stratified FI analyses by age: < 65, 65–85, and ≥ 85 years, and modeled FAI across ages. Except for FI at ages ≥ 85, BMI had U-shaped associations with FI and FAI, where BMI around 26-28 kg/m2 was associated with the lowest physiological age. MetS was associated with higher FI and FAI, except for FI at ages < 65, and modified the BMI-FI association at ages 65–85 (p-interaction = 0·02), whereby the association between higher BMI levels and FI was stronger in individuals with MetS. Age modified the MetS-FI association in ages ≥ 85, such that it was stronger at higher ages (p-interaction = 0·01). Low BMI, high BMI, and metabolic syndrome were associated with higher physiological age, contributing to overall health status among older individuals and potentially accelerating aging. 

Place, publisher, year, edition, pages
Springer Nature, 2024
Keywords
Biological age, Frailty index, Metabolic health, Metabolic syndrome, Obesity
National Category
Geriatrics Gerontology, specialising in Medical and Health Sciences
Research subject
Wellbeing in long-term health problems (WeLHP)
Identifiers
urn:nbn:se:his:diva-23494 (URN)10.1007/s11357-023-01032-9 (DOI)001126625000002 ()38102440 (PubMedID)2-s2.0-85179665831 (Scopus ID)
Funder
Forte, Swedish Research Council for Health, Working Life and Welfare, 2022-00672The Karolinska Institutet's Research Foundation, 2022-01718Karolinska Institute, 2022-01296NIH (National Institutes of Health), R01 AG060470NIH (National Institutes of Health), AG059329Swedish Research Council, 2016–03081NIH (National Institutes of Health), AG04563NIH (National Institutes of Health), AG10175Swedish Research Council, 825-2007-7460Swedish Research Council, 825-2009-6141NIH (National Institutes of Health), R01AG08861Axel and Margaret Ax:son Johnson FoundationVårdal Foundation
Note

CC BY 4.0 DEED

© 2023, The Author(s)

Published: 16 December 2023

Correspondence Address: P. Ler; Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Nobels väg 12A, Solna, 171 65, Sweden; email: peggy.ler@ki.se

Open access funding provided by Karolinska Institute. This work was supported by the Swedish Research Council for Health, Working Life and Welfare (Forte; 2022-00672); the Strategic Research Program in Epidemiology (SFOepi) at Karolinska Institutet, Karolinska Institutet’s Research Foundation (2022-01718); Loo and Hans Osterman’s Foundation (2022-01222, 2023-01855); the Foundation for Geriatric Diseases at Karolinska Institutet (2022-01296); the National Institutes of Health (NIH; R01 AG060470, AG059329), and the Swedish Research Council (Vetenskaprådet; 2016–03081). SATSA was supported by the NIH (grants AG04563 and AG10175), the MacArthur Foundation Research Network on Successful Aging, the Swedish Research Council for Working Life and Social Research (97:0147:1B, 2009-0795), and the Swedish Research Council (825-2007-7460 and 825-2009-6141). OCTO-Twin was supported by the NIH (R01AG08861). GENDER was supported by the MacArthur Foundation Research Network on Successful Aging, The Axel and Margaret Ax:son Johnson’s Foundation, The Swedish Council for Social Research, and the Swedish Foundation for Health Care Sciences and Allergy Research. The funders had no role in the study design, data collection, data analysis, interpretation, or writing of the manuscript.

Available from: 2023-12-28 Created: 2023-12-28 Last updated: 2025-09-29Bibliographically approved
Carlstedt, A. B., Bjursell, C., Nyman, R. & Dahl Aslan, A. K. (2024). Older workers and extended working life - Managers' experiences and age management. Work: A journal of Prevention, Assessment and rehabilitation, 79(3), 1323-1331
Open this publication in new window or tab >>Older workers and extended working life - Managers' experiences and age management
2024 (English)In: Work: A journal of Prevention, Assessment and rehabilitation, ISSN 1051-9815, E-ISSN 1875-9270, Vol. 79, no 3, p. 1323-1331Article in journal (Refereed) Published
Abstract [en]

BACKGROUND: In 2020 the Swedish Government started a gradual raising of the retirement age, but employers have been silent on the issue. Little is known about whether and how they reflect on what it will mean for their organization, or whether they already have, or are going to, make arrangements in order to facilitate and motivate older workers to stay longer.

OBJECTIVE: The aim of this study was to explore and describe managers' experiences of older workers and age management in connection with the increase of the retirement age in Sweden.

METHODS: Data was collected through semi-structured interviews with fourteen managers from a broad set of organizations in the public and private sectors, and from the Middle and East of Sweden. The transcribed material was analysed in line with qualitative content analysis.

RESULTS: The analysis ended up in seven main categories with associated sub-categories: Older Workers, Retirement Ages, Transition Initiatives, Competence Transfer, Competence Development, Increased Retirement Ages, Knowledge Gaps.

CONCLUSION: Our findings reveal that there is an ambivalence in addressing the issue of age among the interviewed managers, what we have interpreted and labelled as "silent age discrimination", and it was shown that they do not have elaborated strategies for age management.

Place, publisher, year, edition, pages
IOS Press, 2024
Keywords
competence development, Competence transfer, knowledge gaps, prolonged working life, transition, Adult, Aged, Ageism, Female, Humans, Interviews as Topic, Male, Middle Aged, Qualitative Research, Retirement, Sweden, human, interview, procedures, psychology
National Category
Work Sciences Other Social Sciences not elsewhere specified Social Work
Research subject
Wellbeing in long-term health problems (WeLHP)
Identifiers
urn:nbn:se:his:diva-24727 (URN)10.3233/WOR-230468 (DOI)001368360900025 ()38820043 (PubMedID)2-s2.0-85208772237 (Scopus ID)
Projects
Age@Work project
Funder
Chalmers University of Technology
Note

CC BY 4.0

Address for correspondence: Anita Björklund Carlstedt, Department of Rehabilitation, School of Health and Welfare, Jönköping University, Box 1026, 551 11 Jönköping, Sweden. Tel.: +46 33 101266, Mobile: +46 708 261250; E-mail:Anita.Bjorklund@ju.se; ORCID: 0000-0003-3594-4805.

The study was partly financed by Chalmers’ Innovation Office for funding the data collection of this study (ID: V510-A), and partly from the Age@Work project run by the Baltic Sea Labour Forum.

Available from: 2024-11-21 Created: 2024-11-21 Last updated: 2025-11-13Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-6305-8993

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