Bing Zhang1, Xiaohui Jiao, Limin Mao, Jie Xue. 1. Department of Oral and Maxillofacial Surgery, The Stomatology College of Harbin Medical University, YouZheng Street 23, NanGang District, Harbin 150001, China. jxhui1@163.com
Abstract
BACKGROUND: We investigated whether maternal and paternal cigarette smoking during early pregnancy could increase the risk of delivering an infant with an orofacial cleft. METHODS: A case-control study was carried out in China. 304 infants born with an isolated nonsyndromic oral cleft and 453 non-malformed controls were recruited as participants and their exposure to smoke plus family history data were collected. RESULTS: The relative odds ratios of maternal smoking to cause an orofacial cleft in infant increased for 3.30 (95% CI, 1.17-9.33) in CLO and 3.12 (95% CI, 1.24-7.84) in CLP from 1 to 10 cigarettes per day before pregnancy. The unadjusted odds ratio is 3.64 (95% CI, 1.01-13.19) and the adjusted OR is 7.00 (95% CI, 1.44-34.13) in CLO from 1 to 10 cigarettes during the first trimester. Paternal smoking in the periconceptional period was strongly associated with all subtypes of CLP. The association with medium ETS (2-6h) at home or at work was strongest for infants with all OFCs in the periconceptional period from 1 month before pregnancy through the end of the first trimester. CONCLUSION: This study confirmed the modest association between maternal smoking and orofacial clefts. 2010 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.
BACKGROUND: We investigated whether maternal and paternal cigarette smoking during early pregnancy could increase the risk of delivering an infant with an orofacial cleft. METHODS: A case-control study was carried out in China. 304 infants born with an isolated nonsyndromic oral cleft and 453 non-malformed controls were recruited as participants and their exposure to smoke plus family history data were collected. RESULTS: The relative odds ratios of maternal smoking to cause an orofacial cleft in infant increased for 3.30 (95% CI, 1.17-9.33) in CLO and 3.12 (95% CI, 1.24-7.84) in CLP from 1 to 10 cigarettes per day before pregnancy. The unadjusted odds ratio is 3.64 (95% CI, 1.01-13.19) and the adjusted OR is 7.00 (95% CI, 1.44-34.13) in CLO from 1 to 10 cigarettes during the first trimester. Paternal smoking in the periconceptional period was strongly associated with all subtypes of CLP. The association with medium ETS (2-6h) at home or at work was strongest for infants with all OFCs in the periconceptional period from 1 month before pregnancy through the end of the first trimester. CONCLUSION: This study confirmed the modest association between maternal smoking and orofacial clefts. 2010 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.
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