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  • Title: Types of dairy foods and risk of fragility fracture in the prospective Nurses' Health Study cohort.
    Author: Yuan M, Hu FB, Li Y, Cabral HJ, Das SK, Deeney JT, Zhou X, Paik JM, Moore LL.
    Journal: Am J Clin Nutr; 2023 Dec; 118(6):1172-1181. PubMed ID: 37777015.
    Abstract:
    BACKGROUND: Fragility fractures present enormous health challenges for women. Dairy products provide many bone-beneficial nutrients, such as calcium and vitamin D. Individual dairy foods may exert different effects on bone health. OBJECTIVES: The aim of this study was to investigate the associations between total dairy, yogurt, milk, and cheese and fragility fracture risk among females in the prospective Nurses' Health Study (NHS) conducted in the United States. METHODS: In the current analysis, 103,003 females with mean age of 48 y were followed from 1980-2004. Proportional hazards models were used to estimate risk of first fracture (of the wrist, hip, or vertebrae) by intakes of dairy foods (total dairy, milk, yogurt, or cheese) obtained from a food frequency questionnaire. Fractures that were caused by high-trauma events were not included. We relied on self-reported data for wrist and hip fractures whereas for vertebral fractures, medical records were used to confirm cases. RESULTS: A total of 5495 incident fracture cases were documented during follow-up. After controlling for relevant confounding variables, consumption of ≥2 servings/d of total dairy (compared with <1 serving/d) was associated with lower fracture risk (hazard ratio [HR]: 0.74; 95% confidence interval [CI]: 0.61, 0.89). More than 2 servings of milk per day (compared with <1 serving/d) were associated with a lower fracture risk (HR: 0.85; 95% CI: 0.77, 0.94). Intakes of calcium, vitamin D, and protein from nondairy sources did not modify the effects of total dairy or milk on fracture risk. There was no association between yogurt intake and fracture risk. Intake of cheese (≥1 servings/d compared with <1 serving/wk) was weakly associated with lower fracture risk (HR: 0.89; 95% CI: 0.79, 0.99). CONCLUSIONS: Higher total dairy, milk, and cheese intakes are associated with lower risks of fracture in females in the NHS.
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