Mothers tended to overreport categorical infant birth weight of their children

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Title:	Mothers tended to overreport categorical infant birth weight of their children
Authors:	(Li CY);(Wei JN);(Lu TH);(Chuang LM);宋鴻樟(Fung-Chang Sung)
Contributors:	公共衛生學院環境醫學研究所
Keywords:	Birth weight;Recall validity;Birth registry;Case–control study;Information bias;Misclassification
Date:	2006-12
Issue Date:	2009-08-25 14:29:29 (UTC+8)
Abstract:	Objectives We validated infant birth weight by interview with mothers. Study Design and Setting Infant birth weights obtained from maternal interview were compared with the data documented in birth certificates. Study subjects were mothers of 1,432 schoolchildren who participated in a diabetes mass screening program in 1992–1997, Taiwan. Data of infant birth weight obtained from telephone interview with mothers were compared with those from birth certificates to evaluate the accuracy of maternal report in eight categorized groups: <2,000, 2,000–2,499, 2,500–2,999, 3,000–3,499, 3,500–3,999, 4,000–4,499, 4,500–4,999, and ≥ 5,000 g. Results The exact agreement was as low as 15.9% but increased substantially to 67.7% if maternal reports of weight one category higher than birth registry weight were considered to be indicative of agreement. Lower orders of birth weight were significantly associated with reports of higher category. But teen mothers and/or low-income mothers were associated with lower risks of overreport. Conclusion Our data suggested that birth weight–associated studies in Taiwan should “round number” to an upper category rather than a lower category to avoid serious misclassification in birth weight.
Relation:	JOURNAL OF CLINICAL EPIDEMIOLOGY 59(12)1319~1325
Appears in Collections:	[Graduate Institute of Environmental Medicine] Journal articles

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