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Passive maternal smoking and birthweight in a south Indian population
M Mathai1, R Vijayasri, S Babu
1Christian Medical College & Hospital, Vellore, India.
British Journal of Obstetrics and Gynaecology
|April 1, 1992
Objective:
To determine the effects of passive maternal smoking on birthweight.
Design:
Cohort of consecutive singleton live births.
Setting:
Teaching hospital in South India.
Subjects:
994 infants and their mothers.
Main Outcome Measure:
Birthweight.
Results:
All the women were themselves non-smokers; 520 (52%) were passive smokers while the remainder were not exposed to tobacco smoke. Infants born to passive smokers were on the average 55 g lighter than those born to non-smokers. Passive smoking was associated with a decrease in birthweight of 63 g (95% CI 12-114 g) even after adjusting for other variables known to affect birthweight.