Table 7.
Current cigar smoking and esophageal cancer by inhalation level, cigars per day, and duration
| Study | Cohort name | Inhalation level | Cigars per day | Duration (years) | Effect estimate | 95% CI | Measure | Primary/secondary* |
|---|---|---|---|---|---|---|---|---|
| Shanks1998 | CPS-I | 1 to 2 | 2.28 | (0.74, 5.33) | IRR | Primary | ||
| Shanks1998 | CPS-I | 3 to 4 | 3.93 | (1.43, 8.55) | IRR | Primary | ||
| Shanks1998 | CPS-I | 5+ | 5.19 | (2.23, 10.22) | IRR | Primary | ||
| Shanks1998 | CPS-I | 1 to 2 | 2.64 | (0.03, 14.67) | IRR | Secondary | ||
| Shanks1998 | CPS-I | 3 to 4 | 1.56 | (0.02, 8.68) | IRR | Secondary | ||
| Shanks1998 | CPS-I | 5+ | 5.63 | (1.81, 13.14) | IRR | Secondary | ||
| Shapiro2000 | CPS-II | 1 to 2 | 1.8 | (0.60, 5.00) | HR | Primary | ||
| Shapiro2000 | CPS-II | 3+ | 1.9 | (0.80, 4.90) | HR | Primary | ||
| Shanks1998 | CPS-I | None | 3.4 | (1.90, 5.61) | IRR | Primary | ||
| Shanks1998 | CPS-I | Slight | 1.9 | (0.02, 10.58) | IRR | Primary | ||
| Shanks1998 | CPS-I | Moderate-deep | 14.84 | (2.98, 43.37) | IRR | Primary | ||
| Shanks1998 | CPS-I | None | 4.15 | (1.34, 9.68) | IRR | Secondary | ||
| Shanks1998 | CPS-I | Slight | 2.22 | (0.03, 12.37) | IRR | Secondary | ||
| Shanks1998 | CPS-I | Moderate-deep | 2.69 | (0.04, 14.94) | IRR | Secondary | ||
| Shapiro2000 | CPS-II | No inhalation | 1.6 | (0.70, 4.10) | HR | Primary | ||
| Shapiro2000 | CPS-II | Inhalation | 1 | (0.10, 7.20) | HR | Primary | ||
| Shapiro2000 | CPS-II | <25 | 0.9 | (0.10, 6.40) | HR | Primary | ||
| Shapiro2000 | CPS-II | 25+ | 2.2 | (1.00, 4.70) | HR | Primary | ||
*Primary cigar smoking: current, exclusive cigar smoking with no previous history of cigarette or pipe smoking; secondary cigar smoking: current, exclusive cigar smoking with previous history of cigarette or pipe smoking.