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Effect of genotype on mean smoking duration
| Duration (years) mean ± SD | P value | |
|---|---|---|
| CHRNA5 (c.1192G > A) rs16969968 | ||
| GG | 35.4 ± 12.4 | 0.402 |
| GA | 30.6 ± 13.6 | |
| AA | 31.8 ± 10.7 | |
| CHRNA3 (c.65C > T) rs1051730 | ||
| CC | 35.8 ± 13.1 | 0.320 |
| CT | 30.6 ± 12.9 | |
| TT | 35.8 ± 10.3 | |
