Recurrent dieting and smoking among Finnish men and women.
OBJECTIVE
To examine the association of smoking with recurrent dieting and BMI among Finnish adults.


METHODS
We used questionnaire data from 1990 on 11,055 subjects from the Finnish Twin Cohort who were 33 to 61 years of age. Multinomial logistic regression analysis was carried out using lifetime dieting as the outcome variable and smoking as the main explanatory variable, adjusted for BMI and age. Twin pairs discordant for dieting and smoking were studied to examine the effect of environmental and genetic factors.


RESULTS
Among women, current smokers [odds ratio (OR), 1.09 to 1.41 at different ages] and former smokers (OR, 1.52 to 2.82) were more likely to have dieted recurrently than never smokers. Among men, current smokers were less likely (OR, 0.69; 95% confidence interval, 0.55, 0.87) and former smokers were more likely (OR, 1.30; 95% confidence interval, 1.05, 1.61) to have dieted recurrently at different ages. The differences between the discordant pairs were consistent with this, although not statistically significant.


CONCLUSIONS
Recurrent dieting was associated with former smoking in both sexes and with current smoking in women.
Saarni
Suoma E
SE
Department of Public Health, PO Box 41, University of Helsinki, and Department of Psychiatry, Helsinki University Hospital, Finland. suoma.saarni@helsinki.fi
Silventoinen
Karri
K
Rissanen
Aila
A
Sarlio-Lähteenkorva
Sirpa
S
Kaprio
Jaakko
J
D000328:Adult; D001835:Body Weight; D015331:Cohort Studies; D004038:Diet, Reducing / Q000706:statistics & numerical data*; D004522:Educational Status; D005260:Female; D005387:Finland / Q000453:epidemiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D012008:Recurrence; D012044:Regression Analysis; D012907:Smoking / Q000453:epidemiology*; D011795:Surveys and Questionnaires