Figure 1.

Schematic of parents’ quit status.

Note: Among age 17 daily smokers, the schematic is the same, except the sample sizes are smaller: Among the 850 children with parents who ever smoked by age 8, 592 children had parents who currently smoked at age 8, 258 children had parents who quit by age 8, 461 children had parents who currently smoked at age 17, and 131 children had parents who quit by age 17.