Table 1 Characteristics of each study chosen in current meta-analysis (N = 10,160 participants)
Study name | Publication year | Sample Size | % Caucasian | % male | Current smoking | Never smoking | Val/* genotype frequency (%) | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Val/Val | Val/Met | Met/Met | Val/Val | Val/Met | Met/Met | ||||||
Lang et al. | 2007 | 253 | 100 | 48.4 | 67 | 41 | 6 | 105 | 30 | 4 | 96.0 |
Wang et al. | 2007 | 149 | 0 (100% Han Chinese) | 100 | 30 | 51 | 20 | 12 | 20 | 16 | 75.8 |
Montag et al. | 2008 | 554 | 100 | 35.3 | 90 | 47 | 6 | 264 | 136 | 11 | 96.9 |
Landi et al. | 2009 | 2238 | 100 | NA | 879 | 521 | 62 | 458 | 277 | 41 | 95.4 |
Zhang et al. | 2012 | 628 | 0 (100% Han Chinese) | 100 | 81 | 177 | 64 | 74 | 156 | 76 | 77.7 |
Zhang et al. | 2015 | 1318 | 0 (100% Han Chinese) | 100 | 215 | 456 | 173 | 114 | 253 | 107 | 78.8 |
Jiang et al. (EA) | 2017 | 1616 | 100 | 49.3 | 623 | 235 | 17 | 508 | 210 | 23 | 97.5 |
Jiang et al. (AA) | 2017 | 3404 | 0 (100% African American) | 51.8 | 1543 | 121 | 1 | 1636 | 100 | 3 | 99.9 |
