Impact of breastfeeding on body weight of preschool children in a rural area of Japan: Population-based cross-sectional study

Hirokazu Komatsu, Takashi Yorifuji, Toshihide Iwase, Ayako Sasaki, Soshi Takao, Hiroyuki Doi

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

To investigate the effect of exclusive breastfeeding on the likelihood of Japanese preschool children being overweight, population-based cross-sectional survey data from M town in Japan were used. Using the population registry of this town, all 616 preschool children were identified, and a self-administered questionnaire was sent to their parents. The exposure variable of interest was exclusive breastfeeding from birth to 6 months, and the outcome variable of interest was the children being overweight at preschool age. Statistical analyses used included logistic regression and sensitivity analyses. In the final analyses, we included 448 preschool children. Although all point estimates indicated a protective effect, logistic regression analyses showed no significant reduction in being overweight due to exclusive breastfeeding in the unadjusted model (odds ratio (OR) = 0.70, 95% confidence intervals: 0.301.64), the model adjusted for birth weight (OR = 0.70, 95% CI: 0.301.63), the model adjusted for child lifestyle (OR = 0.71, 95% CI: 0.301.67), or the model adjusted for parental factors (OR = 0.46, 95% CI: 0.15-1.37). In sensitivity analyses, point estimates were not significant, but a protective effect was observed. In conclusion, our results suggest that breastfeeding might have a protective effect on Japanese preschool children against being overweight, although statistical significance was not observed due to the limitation of the statistical power of the findings.

Original languageEnglish
Pages (from-to)49-55
Number of pages7
JournalActa medica Okayama
Volume63
Issue number1
Publication statusPublished - Feb 2009

Keywords

  • Breastfeeding
  • Overweight
  • Preschool children

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

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