Effects of life-style on body mass index change.
The objective of this study was to determine the effects of age and life-style factors on body mass index (BMI) in a longitudinal, community-based sample. A total of 568 men and 668 women (20-60 years of age) were randomly chosen from four Northern California communities and followed for up to 7 years. Age, sex, marital status, smoking status, hours of television watched, frequency of consumption of several food items, and physical activity were used to predict rate of change of body mass index (BMI-slope). BMI increased the most for both sexes through at least age 54. The BMI-slope was higher for women compared with men, and for smokers who stopped compared with those who never smoked or continued to smoke during the study. The BMI-slopes were lower for individuals who increased activity. Other life-style variables had weak or inconsistent effects on the BMI-slope. We conclude that the BMI-slope increases over age for both sexes and that increased physical activity may reduce the BMI-slope.
Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, CA.
C B
CB
Taylor
D E
DE
Jatulis
M A
MA
Winkleby
B J
BJ
Rockhill
H C
HC
Kraemer
D000328:Adult; D017677:Age Distribution; D015992:Body Mass Index; D015444:Exercise; D005260:Female; D006801:Humans; D008019:Life Style / Q000208:ethnology; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D009747:Nutritional Physiological Phenomena; D011897:Random Allocation; D012307:Risk Factors; D017678:Sex Distribution; D012907:Smoking