Table 1.

Characteristics of the GWAS from which the summary statistics were obtained.

Variable	GWAS Source	Population Used	Total Participants	Cases	Controls	SNPs Covered	Genome-wide significant SNPs
Lifetime Smoking Index	Wootton et al24	UK Biobank	462,690*	NA	NA	7,683,352	126
Depression	Howard et al. /PGC27	UK Biobank & 33 cohorts	500,199	170,756	329,443	8,483,301	50
C-Reactive Protein Levels	Han et al28	UK Biobank	418,642	NA	NA	8,927,092	526

NA: Not applicable as continuous variable.

*249 318 never smokers, 164 649 former smokers and 48 723 current smokers.