母親のスポーツ歴と児の出生時体重との関連性についての疫学的研究

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Birth weight is one of the important indices on infant health development. The purpose of this study was to investigate the relationship between maternal history of sports activities and birth weight. The cohort included four groups. The first one was composed of 744 mothers who had delivered at Hospital A in Aichi Prefecture during 1986 and 1990 before this study plan was made. A self-administered questionnaire concerning sports activities was sent to them. Among them, 262 subjects replied to the questionnaire with sufficient information, 216 were not delivered due to having moved or insufficient addresses, and 266 did not reply. The second was composed of 49 mothers who had babies at Hospital A between July and December 1990. They were handed the same questionnaire after delivery. The third one was 15 mothers who delivered babies at Hospital B on an island in Kagoshima Prefecture between July and December 1990, and the fourth was five mothers delivering babies at Hospital C in Fukuoka Prefecture. The same procedure as the second group was followed for these. Medical records were examined for their obstetrical information-maternal age, preconceptual weight, weight gain during pregnancy, birth order, duration of labor, gestational age, birth weight, sex of neonate. Records were available for 324 subjects among 331 whose questionnaires were returned. Five were excluded from the analysis due to a shorter gestational period than 28 weeks. Logistic regression analysis was used to identify risk factors relating to low birth weight (LBW). The four groups were pooled in this analysis, since the sample sizes of three groups were too small. The dependent variable was the logarithm of the LBW incidence rate, and the independent variables were maternal age, preconceptual weight, weight gain during pregnancy, birth order, duration of labor, gestational age, sex of neonate, maternal smoking habits, maternal occupation during pregnancy, and maternal sports activities before and during pregnancy. The results were summarized as follows : 1) The risk of LBW was elevated in primipara, female, premature birth, smoking, less preconceptual weight, and less weight gain during pregnancy. These are the same risk factors for LBW as those reported in many studies. 2) The sports activities during pregnancy may be a possible cause of LBW, and the effect of sports activities before pregnancy on birth weight might vary with the age of sports activities. 3) Although the fact that the risk factors for LBW are similar to many previous reports probably certifies the validity of the authors' research methods, the wide confidence intervals for risk ratios are believed to indicate that the sample size was too small.
中京大学の論文
1995-12-05

母親のスポーツ歴と児の出生時体重との関連性についての疫学的研究

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