Cross-sectional and longitudinal associations between body mass index and marriage-related factors.
OBJECTIVE
To assess the relationship between marriage and obesity.


METHODS
Cross-sectional and longitudinal associations were examined between participant body mass index (BMI), spouse BMI, and participant diet and exercise habits.


RESULTS
Spouse and participant BMI and BMI changes over 2 years were significantly associated. Participant BMI was associated with higher consumption of calorie-dense foods and lower frequency of physical activity. Participants' eating and exercise habits were only weakly related to spouse BMI. BMI did not predict the likelihood of marriage or divorce. However, marriage was associated with a significant 2-year weight gain and divorce with a significant 2-year weight loss.


CONCLUSIONS
The results suggest that spouse similarity in BMI is at least partly due to shared environment. The observed effects of marriage and divorce on weight may be due to the influence of marriage on inducements to eat (e.g., shared meals) or on motivation for weight control.
Division of Epidemiology, University of Minnesota, Minneapolis, Minnesota 55454-1015, USA. jeffrey@epi.umn.edu
Robert W
RW
Jeffery
Allison M
AM
Rick
D000328:Adult; D015992:Body Mass Index; D003430:Cross-Sectional Studies; D004032:Diet; D004243:Divorce; D004522:Educational Status; D015444:Exercise; D005260:Female; D005502:Food; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D017533:Marital Status; D008393:Marriage; D008875:Middle Aged; D018454:Spouses; D015430:Weight Gain; D015431:Weight Loss