Spinal Bone Mineral Density in Premenopausal Vegetarian and Nonvegetarian Women: Cross-sectional and Prospective Comparisons

摘要: Abstract Objective To compare spinal bone mineral density (BMD) and 1-year BMD change between premenopausal vegetarian nonvegetarian women. Design Cross-sectional comparison of at baseline prospective a subsample. Setting A western Canadian metropolitan area. Subjects/samples Healthy (n=15 lacto-ovo-vegetarian, n=8 vegan) (n=22) women aged 20 to 40 years, with regular menstrual cycles stable body weight completed measurements. Twenty these (6 5 vegan, 9 non-vegetarian) participated in repeat measurements approximately 13 months. Statistical analyses performed Descriptive statistics, independent sample paired t tests, 1-way analysis variance, correlation analysis, stepwise multiple regression were used groups assess associations BMD. Results At baseline, subjects 27.2±5.1 years old. Vegetarians had lower mass index (21.1±2.3 vs 22.7±1.9, P 2 1.216±0.132 g/cm , =.06), although this was not apparent as covariate ( =.14). Baseline predicted by vitamin B-12 intake total fat R =.24, =.001). Participants the follow-up differed only their being older than nonparticipants. Over 1 year, mean increased significantly (1.1%): diet group, non-vegetarians' but vegetarians' unchanged. No other monitored variables associated change. Applications/conclusions Vegetarian should be aware links low weight/body fat, maintain adequate intakes nutrients believed affect J Am Diet Assoc. 1998;98:760-765 .