Questioning the parents of 195 babies who died and those of 780 others who lived, they found that of the mothers whose babies died, 62 percent smoked, contrasted with 25 percent of the mothers whose babies lived.
Küsitledes 195 lapsevanemat, kelle lapsed surid, ja 780 vanemat, kelle lapsed olid elus, leidsid uurijad, et emade hulgas, kelle lapsed surid, oli 62 protsenti suitsetajaid, vastandina 25 protsendile suitsetajatele elusolevate laste emade hulgas.