Table 3.
Hazard ratios for lung cancer incidence, mortality and all-cause mortality according to the pack-years 1 and PYC1 scenarios.
| Multivariate analysisa | Lung cancer incidence | Lung cancer mortality | All-cause mortality | |||
|---|---|---|---|---|---|---|
| Method (ref: XP) | HRb | 95% C.I.c | HR | 95% C.I. | HR | 95% C.I. |
| CT | 1.23 | 1.00–1.51 | 0.49 | 0.34–0.70 | 0.57 | 0.52–0.62 |
| Gender (ref: Female) | ||||||
| Male | 1.09 | 0.83–1.45 | 2.12 | 1.20–3.76 | 1.89 | 1.67–2.13 |
| Age group (ref: 50–55) | ||||||
| 56–63 | 1.91 | 1.46–2.50 | 1.62 | 0.99–2.67 | 1.80 | 1.56–2.07 |
| 64–74 | 2.50 | 1.91–3.26 | 3.46 | 2.17–5.52 | 4.29 | 3.76–4.90 |
| Pack-years (ref: 0) | ||||||
| 0< and <30 | 1.38 | 1.02–1.86 | 1.80 | 1.04–3.16 | 1.10 | 0.98–1.25 |
| 30≤ and <50 | 2.42 | 1.76–3.32 | 5.69 | 3.30–9.80 | 1.36 | 1.18–1.58 |
| 50≤ | 3.63 | 2.46–5.67 | 6.57 | 3.43–12.60 | 1.70 | 1.39–2.07 |
aCox proportional hazards model, bHazard ratio, c95% Confidence interval.