OBJECTIVE: To study the development of body weight with ageing, in a general adult population, taking into account possible period and cohort effects.
DESIGN: A prospective cohort study with 11 years of follow-up. At baseline and after 6 and 11 years, body weight and height were measured.
SETTING: The Doetinchem Cohort Study, consisting of inhabitants of Doetinchem, a town in a rural area of The Netherlands.
SUBJECTS: In total, 4070 healthy men and women aged 20-59 years at baseline.
RESULTS: Increase in BMI with ageing was less profound based on cross-sectional data than based on longitudinal data. More recent-born cohorts had a higher BMI at a given age than cohorts who were born earlier. Increase in mean BMI with ageing was observed in all age groups and was similar for groups with a different educational level. Highest increase in BMI over 11 years was observed in the youngest group, aged 20-29 years at baseline (2.2 [95 % CL 2.0, 2.3] kg/m2), and lowest increase in the oldest group, aged 50-59 years at baseline (1.1 [1.0, 1.3] kg/m2).
CONCLUSIONS: Findings of the present study using longitudinal data suggest that increase in BMI with ageing is underestimated in all age groups by studying cross-sectional data only. Further, weight gain is present in all educational levels and does not stop at middle age.
- Age Factors
- Body Mass Index
- Body Weight
- Cohort Studies
- Cross-Sectional Studies
- Educational Status
- Follow-Up Studies
- Longitudinal Studies
- Middle Aged
- Prospective Studies
- Weight Gain
- Young Adult
- Journal Article
- Research Support, Non-U.S. Gov't