Case-control study on effect of passive smoking during different pregnancy term on small-for-gestational-age infants at term
Han, J.-x.; Gan, D.-k.; Zhai, G.-r.; Shi, Y.
Wei Sheng Yan Jiu 35(6): 788-790
2006
ISSN/ISBN: 1000-8020 PMID: 17290768 Document Number: 598319
To analyze the effect of passive smoking during different pregnancy term to infant birth weight. 155 women which infants were singleton term small-for-gestational-age infant (SGA) -cases and 155 with singleton term non-SGA controls matched by infant sex, infant birthday ( +/-10 days) and maternal age ( < 20 years, 20- 35 years and > or = 35 years) were interviewed. Single and multiple analyses were performed by conditional logistic regression. Passive smoking during the second, the third or the whole term of pregnancy was significantly associated with risk of term SGA (P < 0.05). The odds ratios of these risk factors were 3.07, 2.94 and 3.42 respectively. Passive smoking during the first term of the pregnancy was not associated with risk of term SGA ( P > 0.05) . Decreasing passive smoking during the second or the third term of pregnancy maybe benefits to lower the risk of term SGA.