Are consumption of dairy products and physical activity independently related to bone mineral density of 6-year-old children? Longitudinal and cross-sectional analyses in a birth cohort from Brazil.
- Resource Type
- journal article
- Authors
- Bielemann, Renata M; dos S Vaz, Juliana; Domingues, Marlos R; Matijasevich, Alicia; Santos, Iná S; Ekelund, Ulf; Horta, Bernardo L
- Source
- Public Health Nutrition. Oct2018, Vol. 21 Issue 14, p2654-2664. 11p.
- Subject
- *BONE densitometry
*BONE density
*DAIRY products
*PHYSICAL activity
*DUAL-energy X-ray absorptiometry
*CROSS-sectional method
*COMPARATIVE studies
*EXERCISE
*RESEARCH methodology
*MEDICAL cooperation
*QUESTIONNAIRES
*RESEARCH
*RESEARCH funding
*EVALUATION research
*ACCELEROMETRY
*PHOTON absorptiometry
- Language
- ISSN
- 1368-9800
Objective: To evaluate cross-sectional and longitudinal associations of consumption of dairy products and physical activity (PA) with bone mineral density (BMD).Design: Cohort study with children from the 2004 Pelotas (Brazil) Birth Cohort.Setting: Pelotas, a medium-sized Brazilian city.Subjects: The study started in 2004 and mothers/children were interviewed/measured periodically from birth to age 6 years. PA was measured by maternal proxy at 4 and 6 years and by accelerometry at 6 years. Consumption of dairy products was measured using 24 h food recall (at 4 years) and FFQ (at 6 years). Total-body and lumbar-spine BMD (g/cm2) were measured by dual-energy X-ray absorptiometry.Results: At 6 years, BMD was measured in 3444 children and 2636 children provided data on objectively measured PA by accelerometry. Consumption of dairy products at 4 years was associated with higher lumbar-spine BMD at 6 years in boys, while current consumption was positively associated with BMD in both sexes (P < 0·001). PA assessed by maternal report at 4 and 6 years of age was associated with higher BMD at 6 years in boys. PA assessed by accelerometry was positively related to total-body and lumbar-spine BMD in boys and lumbar-spine BMD in girls. We did not find evidence for an interaction between PA and consumption of dairy products on BMD.Conclusions: We observed positive and independent longitudinal and cross-sectional associations between consumption of dairy products and PA with BMD in the total body and at the lumbar spine in young children. [ABSTRACT FROM AUTHOR]