Fig. 1
From: In utero and childhood exposure to tobacco smoke and multi-layer molecular signatures in children
Percentage of children exposed to different dose and/or duration of tobacco smoking in all children and by cohort: in pregnancy (a), in childhood (b), and in pregnancy and childhood combined (c). Mat-SHS, mothers exposed to SHS; Non-sust, non-sustained smoker mothers; Sust (=<9), sustained smoker mothers at low dose—less than or equal to 9 cigarettes per day; Sust (>9), sustained smoker mothers at high dose—more than 9 cigarettes per day. Other categories are self-explanatory