Research Article
Ethnic-Specific Genetic Association of Variants in the Corticotropin-Releasing Hormone Receptor 1 Gene with Nicotine Dependence
Table 1
Clinical characteristics of pooled, EA, and AA samples (mean ± SD where appropriate).
| Characteristic | EA | AA | Pooled populations |
| Number of families | 200 | 402 | 602 | Avg. members/family | 3.17 ± 0.69 | 3.14 ± 0.75 | 3.15 ± 0.73 | Number of subjects | 671 | 1,366 | 2,037 | % female | 69.5 | 66.1 | 67.2 | Age (years) | 40.5 ± 15.5 | 39.4 ± 14.4 | 39.7 ± 14.8 | Number of smokers | 515 | 1,053 | 1,568 | Years smoked | 23.2 ± 13.5 | 20.4 ± 12.5 | 21.3 ± 12.9 | Cigarettes smoked/day | 19.5 ± 13.4 | 19.4 ± 13.3 | 19.5 ± 13.3 | FTND score | 6.33 ± 2.22 | 6.26 ± 2.15 | 6.29 ± 2.17 | Age of smoking onset (yrs) | 15.5 ± 4.4 | 17.3 ± 4.7 | 16.7 ± 4.7 |
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