The meta-analysis included 32 389 genotyped men and women of African ancestry from 13 studies with sample sizes ranging from n=632 to n=8208 (Table 1). Our meta-analysis sample was 66.1% female, the mean age when smoking information was collected ranged from 35.5 to 73.4 years, and 52.7% were ever smokers. Among smokers, mean CPD ranged from 11.5 to 15.7, the mean AOI ranged from 17.3 to 23.3 years, and 44.8% were former smokers.
