The study adds weight to the view that exposure to environmental tobacco smoke could be associated with an increased risk of early, spontaneous abortion.
Evidence from:
L George et al. Epidemiology (2006) Vol.17 p 500 – 505
“Environmental Tobacco Smoke and Risk of Spontaneous Abortion”
Abortion is an indivisible outcome.
The relative risk of spontaneous abortion was increased for women exposed to ETS; OR = 1.7 (95% CI = 1.2 to 2.4) and for women who smoked; OR = 2.1 (95% CI = 1.4 to 3.3).
Further detail: