Table 6. .
Effects of Smoking by Cigarettes per Day
| Phenotype, Population, and No. of Daily Cigarettes |
OR | 95% CI |
| All OCs: | ||
| DBS: | ||
| 1–9 | 1.12 | .65–1.92 |
| 10–19 | 1.55 | 1.06–2.25 |
| 20+ | .93 | .42–2.06 |
| Iowa: | ||
| 1–4 | .84 | .42–1.70 |
| 5–14 | 2.17 | 1.17–4.03 |
| 15+ | 2.17 | 1.15–4.07 |
| CL/P: | ||
| Denmark: | ||
| 1–9 | 1.14 | .62–2.08 |
| DBS: | ||
| 10–19 | 1.71 | 1.14–2.56 |
| 20+ | 1.16 | .51–2.64 |
| Iowa: | ||
| 1–4 | .93 | .42–2.07 |
| 5–14 | 2.24 | 1.11–4.50 |
| 15+ | 2.78 | 1.42–5.44 |
| CPO: | ||
| Denmark: | ||
| 1–9 | 1.03 | .42–2.57 |
| DBS: | ||
| 10–19 | 1.17 | .61–2.23 |
| 20+ | .35 | .05–2.67 |
| Iowa: | ||
| 1–4 | .91 | .30–2.75 |
| 5–14 | 2.52 | 1.09–5.81 |
| 15+ | 1.58 | .59–4.21 |