Table 2 Hazard ratio (HR) with 95% confidence interval (CI) for incident lung cancer associated with change of smoking status
No of cases | 100-person year | Adjusted HR (95% CI) | Adjusted subHR* (95% CI) | |
|---|---|---|---|---|
Sustainer | 225 | 0.75 | Reference | Reference |
Reducer | 68 | 0.61 | 0.74 (0.56, 0.98) | 0.74 (0.57, 0.97) |
20–50% reducer | 39 | 0.67 | 0.84 (0.60, 1.18) | 0.83 (0.59, 1.17) |
Over 50% reducer | 29 | 0.55 | 0.64 (0.64, 0.95) | 0.64 (0.43, 0.95) |
Quitter | 176 | 0.73 | 0.78 (0.64, 0.96) | 0.78 (0.64, 0.95) |