Neelon, S E B4; Andersen, Camilla Schou5; Morgen, C S8; Kamper-Jørgensen, Mads9; Oken, E7; Gillman, M W7; Sørensen, T I A10
1 Section of Social Medicine, Department of Public Health, Faculty of Health and Medical Sciences, Københavns Universitet2 Section for Metabolic Genetics, Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, Københavns Universitet3 Department of Public Health, Department of Public Health, Faculty of Health and Medical Sciences, Københavns Universitet4 Department of Community and Family Medicine, Duke University Medical Center and, Duke Global Health Institute, Durham, North Carolina, USA.5 unknown6 Department of Public Health, Faculty of Health and Medical Sciences, Københavns Universitet7 Obesity Prevention Program, Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, Massachusetts, USA.8 Department of Public Health, Faculty of Health and Medical Sciences, Københavns Universitet9 Section of Social Medicine, Department of Public Health, Faculty of Health and Medical Sciences, Københavns Universitet10 Section for Metabolic Genetics, Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, Københavns Universitet
Background/Objectives:Evidence suggests that the child care environment may be more obesogenic than the family home, and previous studies have found that child care use may be associated with obesity in children. Few studies, however, have focused on child care during infancy, which may be an especially vulnerable period. This study examined child care use in infancy and weight status at 12 months of age in a country where paid maternity leave is common and early child care is not as prevalent as in other developed countries.Subjects/Methods:We studied 27821 children born to mothers participating in the Danish National Birth Cohort (DNBC), a longitudinal study of pregnant women enrolled between 1997 and 2002, who were also included in the Childcare Database, a national record of child care use in Denmark. The exposure was days in child care from birth to 12 months. The outcomes were sex-specific body mass index (BMI) z-score and overweight/obesity (BMI ≥85th percentile based on the World Health Organization classification) at 12 months. We conducted multivariable linear and logistic regression analyses examining child care use and weight outcomes.Results:A total of 17721 (63.7%) children attended child care during their first year of life. After adjustment for potential confounders, a 30-day increment of child care was associated with a modestly higher BMI z-score at 12 months (0.03 units; 95% CI: 0.01, 0.05; p=0.003). Similarly, child care use was associated with increased odds of being overweight/obese at 12 months of age (OR 1.05; 95% CI: 1.01, 1.10; p=0.047).Conclusions:Child care in the first year of life was associated with slightly higher weight at 12 months, suggesting that child care settings may be important targets for obesity prevention in infancy.International Journal of Obesity accepted article preview online, 19 September 2014. doi:10.1038/ijo.2014.173.
International Journal of Obesity (2005), 2015, Vol 39, Issue 1, p. 33-38