Modifiable midlife risk factors, independent aging, and survival in older men: report on long-term follow-up of the Uppsala Longitudinal Study of Adult Men cohort.
OBJECTIVE
To examine relationships between modifiable midlife factors, aging, and physical and cognitive function (independent aging) and survival in very old age.


METHODS
Prospective cohort.


METHODS
Uppsala Longitudinal Study of Adult Men, Uppsala, Sweden.


METHODS
Swedish men investigated in 1970-74 (aged 48.6-51.1) and followed up for four decades (N=2,293).


METHODS
Conventional cardiovascular risk factors, body mass index (BMI), and dietary biomarkers were measured, and a questionnaire was used to gather information on lifestyle variables at age 50. Four hundred seventy-two men were reinvestigated in 2008-09 (aged 84.8-88.9). Independent aging was defined as survival to age 85, Mini-Mental State Examination score of 25 or greater, not living in an institution, independent in personal care and hygiene, able to walk outdoors without personal help, and no diagnosis of dementia. The National Swedish Death Registry provided survival data.


RESULTS
Thirty-eight percent of the cohort survived to age 85. Seventy-four percent of the participants in 2008-09 were aging independently. In univariable analyses, high leisure-time physical activity predicted survival but not independent aging. Low work-time physical activity was associated more strongly with independent aging (odds ratio (OR)=1.84, 95% confidence interval (CI)=1.18-2.88) than with survival (OR=1.27, 95% CI=1.05-1.52). In multivariable analyses, midlife BMI was negatively associated (OR=0.80/SD, 95% CI=0.65-0.99/SD), and never or former smoking was positively associated (OR=1.66, 95% CI=1.07-2.59), with independent aging. As expected, conventional cardiovascular and lifestyle risk factors were associated with mortality.


CONCLUSIONS
A normal midlife BMI and not smoking were associated with independent aging close to four decades later, indicating that normal weight at midlife has the potential not only to increase survival, but also to preserve independence with aging.
Geriatrics, Department of Public Health and Caring Sciences, Uppsala University, Uppsala, Sweden.
Kristin
K
Franzon
Geriatrics, Department of Public Health and Caring Sciences, Uppsala University, Uppsala, Sweden.|Medical Products Agency, Uppsala, Sweden.
Björn
B
Zethelius
Clinical Nutrition and Metabolism, Department of Public Health and Caring Sciences, Uppsala University, Uppsala, Sweden.
Tommy
T
Cederholm
Geriatrics, Department of Public Health and Caring Sciences, Uppsala University, Uppsala, Sweden.
Lena
L
Kilander
D000375:Aging; D005500:Follow-Up Studies; D006801:Humans; D057187:Independent Living; D008019:Life Style; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012307:Risk Factors; D015996:Survival Rate; D013548:Sweden; D013997:Time Factors
independent aging; longitudinal; obesity; smoking; successful aging