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Low physical activity and mortality in women : Baseline lifestyle and health as alternative explanations
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- Carlsson, Sofia (author)
- Karolinska Institutet
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- Andersson, Tomas (author)
- Karolinska Institutet
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- Wolk, Alicja (author)
- Karolinska Institutet
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- (creator_code:org_t)
- 2016-09-05
- 2006
- English.
- In: Scandinavian Journal of Public Health. - Karolinska Inst, Div Epidemiol & Social Med, Stockholm Ctr Publ Hlth, Stockholm, Sweden. Karolinska Inst, Dept Epidemiol, Inst Environm Med, Stockholm, Sweden. Karolinska Inst, Dept Nutr Epidemiol, Inst Environm Med, Stockholm, Sweden. : SAGE PUBLICATIONS LTD. - 1403-4948 .- 1651-1905. ; 34:5, s. 480-487
- Journal article (peer-reviewed)
Abstract
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- Aims: The aim of this study was to investigate the association between physical activity and mortality in post-menopausal women. In addition, the authors wanted to investigate to what extent this association could be attributed to confounding from other lifestyle factors, and to reverse causation due to a number of common health problems that may inhibit the ability to exercise. Methods: A total of 27,734 women aged 51-83 years from the Swedish Mammography Cohort were investigated. In 1997 they responded to a detailed questionnaire including questions on physical activity, diet, alcohol intake, smoking, and medical problems. During follow-up in 1999-2004, 1,232 deaths were identified by linkage to the National Population Register. Results: Women with low physical activity (<= 35 MET*h/day) had a 3.22 times increased mortality (95% confidence interval (CI)=2.35-4.43) compared with the most active women (> 50 MET*h/day). No increased risk was seen in women with moderate compared with high physical activity. Sedentary women tended to have a less healthy lifestyle and more health problems at baseline, e. g. almost 30% of them reported high blood pressure compared with less than 20% of active women. Baseline medical problems and lifestyle factors such as smoking, diet, and education accounted for 30% of the excess risk seen in sedentary women (24% and 6% respectively). Conclusions: This study indicates that even fairly small amounts of activity will reduce mortality in older women. However, sedentary women seemed to be a selected group with more medical problems and a less healthy lifestyle. The findings indicate that the association between physical inactivity and mortality will be overestimated if this is not taken into account.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Hälsovetenskap -- Folkhälsovetenskap, global hälsa, socialmedicin och epidemiologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Health Sciences -- Public Health, Global Health, Social Medicine and Epidemiology (hsv//eng)
Keyword
- bias
- confounding
- epidemiology
- physical activity
- women
Publication and Content Type
- ref (subject category)
- art (subject category)
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