[Socio-economic determinants of smoking during pregnancy and birth weight of newborns].

In this survey, we have assessed a socio-economic status of pregnant women smoking during pregnancy and the impact of this status on birth weight of their newborns. The research, we have done on the group of 431 pregnant women. Smoking habit has been declared by 21.6% of women and passive exposure to tobacco smoke has been stated by 32.5% of respondents. We have observed a significant association between active and passive smoking and socio-economic status of respondents. The newborns of actively smoking mothers were lighter of about 216 g according to those ones of mothers who did not smoke and were not exposed to passive smoking, and were lighter than newborns of mothers who were not exposed to passive smoking of about 146 g. We have not observed any significant link between active and passive exposure to tobacco smoke during pregnancy, and a risk of delivering low weighted child. However, in case of newborns weighted above 2500 g., their mothers have not been smoking and have not been exposed to tobacco smoke significantly more often.