juliaoceania -> RE: Smoking Ban - When is it too much? (1/19/2007 3:59:00 PM)
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Here is some information from WHO http://www.ash.org/who-ets-rpt.html#toc66 C. Sudden infant death syndrome (SIDS) There is sufficient evidence to conclude that maternal smoking causes a marked increase in SIDS. Almost 50 studies have examined this relationship and all indicate an increased risk. Since reductions in the prevalence of prone sleeping position, eight studies have examined maternal smoking and SIDS. The pooled unadjusted relative risk from these studies is approximately 5, indicating that infants of mothers who smoke have almost five times the risk of SIDS compared with infants of mothers who do not smoke. Adjustment for potential confounders lowers the risk estimate; however, many studies over-adjust, e.g. by controlling for birth weight, resulting in an inappropriately low estimate of the risk. Pooling the adjusted results still yields a significantly increased risk of SIDS from maternal smoking. With the available data, it is difficult to distinguish the effect of active maternal smoking during pregnancy from that of postnatal ETS exposure of the infant from smoking by the mother. While the mechanism for SIDS is unknown, the predominant effect from maternal smoking is generally attributed to in utero exposure of the foetus. However, clear evidence for an ETS effect arises from six studies examining SIDS and paternal smoking where the mother is a nonsmoker. The pooled unadjusted relative risk from these studies is 1.4 which, though smaller than the effect seen for maternal smoking (RR = 4.7), still indicates a significant risk. Overall, parental smoking, particularly by the mother, appears to be responsible for between a third and a half of all SIDS cases.
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