Effects of Promoting Long-term, Exclusive Breastfeeding on Adolescent Adiposity, Blood Pressure, and Growth Trajectories A Secondary Analysis of a Randomized Clinical Trial

被引:70
作者
Martin, Richard M. [1 ,2 ,3 ]
Kramer, Michael S. [4 ,5 ,6 ,7 ]
Patel, Rita [1 ]
Rifas-Shiman, Sheryl L. [8 ,9 ]
Thompson, Jennifer [8 ,9 ]
Yang, Seungmi [4 ,5 ,6 ,7 ]
Vilchuck, Konstantin [10 ]
Bogdanovich, Natalia [10 ]
Hameza, Mikhail [10 ]
Tilling, Kate [1 ]
Oken, Emily [8 ,9 ]
机构
[1] Univ Bristol, Sch Social & Community Med, Canynge Hall,39 Whatley Rd, Bristol BS8 2PS, Avon, England
[2] Univ Bristol, Univ Hosp Bristol Natl Hlth Serv Fdn Trust, Natl Inst Hlth Res Bristol Nutr Biomed Res Unit, Bristol, Avon, England
[3] Univ Bristol, Med Res Council Integrat Epidemiol Unit, Bristol, Avon, England
[4] McGill Univ, Fac Med, Dept Pediat, Montreal, PQ, Canada
[5] McGill Univ, Fac Med, Dept Epidemiol, Montreal, PQ, Canada
[6] McGill Univ, Fac Med, Dept Biostat, Montreal, PQ, Canada
[7] McGill Univ, Fac Med, Dept Occupat Hlth, Montreal, PQ, Canada
[8] Harvard Med Sch, Dept Populat Med, Boston, MA USA
[9] Harvard Pilgrim Hlth Care Inst, Boston, MA USA
[10] Natl Res & Appl Med Mother & Child Ctr, Minsk, BELARUS
基金
加拿大健康研究院; 美国国家卫生研究院; 英国医学研究理事会;
关键词
AGE; 11.5; YEARS; CHILDHOOD OVERWEIGHT; RISK-FACTORS; SOCIOECONOMIC DIFFERENCES; LATER LIFE; OBESITY; INFANCY; HEIGHT; INCOME; ASSOCIATIONS;
D O I
10.1001/jamapediatrics.2017.0698
中图分类号
R72 [儿科学];
学科分类号
100202 ;
摘要
IMPORTANCE Evidence that breastfeeding reduces child obesity risk and lowers blood pressure (BP) is based on potentially confounded observational studies. OBJECTIVE To investigate the effects of a breastfeeding promotion intervention on adiposity and BP at age 16 years and on longitudinal growth trajectories from birth. DESIGN, SETTING, AND PARTICIPANTS Cluster-randomized Promotion of Breastfeeding Intervention Trial. Belarusian maternity hospitals and affiliated polyclinics (the clusters) were allocated into intervention (n = 16) or control arms (n = 15) in 1996 and 1997. The trial participants were 17 046 breastfeeding mother-infant pairs; of these, 13 557 children (79.5%) were followed up at 16 years of age between September 2012 and July 2015. INTERVENTIONS Breastfeeding promotion, modeled on the Baby-Friendly Hospital Initiative. MAIN OUTCOMES AND MEASURES Body mass index (BMI, calculated asweight in kilograms divided by height in meters squared); fat and fat-free mass indices and percentage of body fat from bioimpedance; waist circumference; overweight and obesity; height; BP; and longitudinal growth trajectories. The primary analysis was modified intention-to-treat (without imputation for losses to follow-up) accounting for within-clinic clustering. RESULTS We examined 13 557 children at a median age of 16.2 years (48.5% were girls). The intervention substantially increased breastfeeding duration and exclusivity compared with the control arm (exclusively breastfed: 45% vs 6% at 3 months, respectively). Mean differences at 16 years between intervention and control groups were 0.21 (95% CI, 0.06-0.36) for BMI; 0.21 kg/m(2) (95% CI, -0.03 to 0.44) for fat mass index; 0.00 kg/m(2) (95% CI, -0.21 to 0.22) for fat-free mass index; 0.71%(95% CI, -0.32 to 1.74) for percentage body fat; -0.73 cm(-2.48 to 1.02) for waist circumference; 0.05 cm(95% CI, -0.85 to 0.94) for height; -0.54 mmHg (95% CI, -2.40 to 1.31) for systolic BP; and 0.71 mmHg (95% CI, -0.68 to 2.10) for diastolic BP. The odds ratio for overweight/obesity (BMI >= 85th percentile vs <85th percentile) was 1.14 (95% CI, 1.02-1.28) and the odds ratio for obesity (BMI >= 95th percentile vs <95th percentile) was 1.09 (95% CI, 0.92-1.29). The intervention resulted in a more rapid rate of gain in postinfancy height (1 to 2.8 years), weight (2.8 to 14.5 years), and BMI (2.8 to 8.5 years) compared with the control arm. The intervention had little effect on BMI z score changes after 8.5 years. CONCLUSIONS AND RELEVANCE A randomized intervention that increased the duration and exclusivity of breastfeeding was not associated with lowered adolescent obesity risk or BP. On the contrary, the prevalence of overweight/obesity was higher in the intervention arm. All mothers initiated breastfeeding, so findings may not apply to comparisons of the effects of breastfeeding vs formula feeding.
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页数:9
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