Abstract:The relationship between smoking and weight was examined in data of the Lipid Research Clinic (LRC) Prevalence Study in Richfield, Minnesota. Weight was analyzed according to smoking status, age, and sex, holding constant self-perceived physical activity relative to others of the same age and sex. Our findings confirm that weight differences between smokers of 15-29 cigarettes a day (cig/day) and those who never smoked are noticeable in 20-39 year olds and quite marked in the 40-59 year age group. ExThis paper was motivated by the observation in many studies that smokers weigh less than those who have never smoked. -11 These studies generally have been restricted in age range or sex and have not considered physical activity as a potential confounding factor.Studying a population-based sample of residents aged 20-59 in a Minneapolis suburb, we examined the relationship between smoking and weight, considering several possible confounding factors: age, sex, and customary physical activity as reported by the person relative to others his or her own age and sex. Dietary recalls were obtained in a subsample of these people.Those attempting smoking cessation are often hindered by potential weight gain. Smoking cessation counselors may be aided in their efforts by clarification of relationships between smoking and weight. Materials and MethodsThe observations were made as part of the Lipid Research Clinic (LRC) Prevalence Study in Richfield, Minnesota (see Figure 1). A simple random sample of 71 per cent of the blocks in four census tracts was taken. Some characteristics of these tracts are given in October 10, 1980. smokers are somewhat heavier than those who never smoked while, among smokers, a U-shaped curve exists with those smoking 15-29 cig/day being the lightest class. Height varied little between smoking classes. Daily caloric intake was estimated based on 24-hour dietary recalls and analyzed according to smoking status, sex, and age. The results showed that smokers of 15-29 cig/day generally are consuming at least as many or more calories as those who never smoked yet have lower weight. (Am J Public Health 1981; 71:391-3%.) cent of those enumerated. Information was also recorded at a home interview in adults in the final nine months of screening. A further sample of 21 per cent of all Visit 1 attendees (whether there was a home interview or not; response rate, 80 per cent of those invited) were seen a second time at Visit 2. About three-fifths of these were drawn randomly from Visit 1 participants, the remainder being selected for various lipid elevations. A 24-hour dietary recall was obtained in all Visit 2 attendees. Thorough probing and food models were used. Coding was done at the Nutrition Coding Center.'2 In total, 3,291 men and women, aged 20-59 years, were included in our study of smoking and weight after certain exclusions were made: race other than White; pregnancy at present or in past three months; those reporting use of medications for high blood pressure and/or high blood sugar and/ o...
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