Table 5.
Five-year relative survival rates of patients with NSCLC according to stage at lung cancer diagnosis
| Stage | Time (yr) | No. at risk | No. of deaths | Observed survival ratea) | Expected survival rateb) | Relative survival (95% CI) |
|---|---|---|---|---|---|---|
| 1 | 0.0–1.0 | 390 | 19 | 0.95 | 0.99 | 0.96 (0.93–0.98) |
| 1.0–2.0 | 371 | 22 | 0.89 | 0.98 | 0.91 (0.88–0.94) | |
| 2.0–3.0 | 349 | 22 | 0.84 | 0.97 | 0.87 (0.82–0.90) | |
| 3.0–4.0 | 327 | 16 | 0.80 | 0.96 | 0.83 (0.79–0.87) | |
| 4.0–5.0 | 311 | 9 | 0.78 | 0.94 | 0.82 (0.77–0.86) | |
| 2 | 0.0–1.0 | 261 | 54 | 0.79 | 0.98 | 0.80 (0.75–0.85) |
| 1.0–2.0 | 207 | 26 | 0.69 | 0.97 | 0.72 (0.65–0.77) | |
| 2.0–3.0 | 181 | 15 | 0.64 | 0.95 | 0.67 (0.60–0.73) | |
| 3.0–4.0 | 166 | 16 | 0.57 | 0.94 | 0.61 (0.55–0.67) | |
| 4.0–5.0 | 150 | 7 | 0.55 | 0.92 | 0.59 (0.53–0.66) | |
| 3 | 0.0–1.0 | 653 | 349 | 0.47 | 0.98 | 0.47 (0.43–0.51) |
| 1.0–2.0 | 304 | 105 | 0.30 | 0.97 | 0.31 (0.28–0.35) | |
| 2.0–3.0 | 199 | 52 | 0.23 | 0.96 | 0.24 (0.20–0.27) | |
| 3.0–4.0 | 147 | 27 | 0.18 | 0.94 | 0.20 (0.16–0.23) | |
| 4.0–5.0 | 120 | 21 | 0.15 | 0.92 | 0.16 (0.14–0.19) | |
| 4 | 0.0–1.0 | 514 | 262 | 0.49 | 0.98 | 0.50 (0.45–0.54) |
| 1.0–2.0 | 252 | 112 | 0.27 | 0.97 | 0.28 (0.24–0.32) | |
| 2.0–3.0 | 140 | 42 | 0.19 | 0.95 | 0.20 (0.17–0.24) | |
| 3.0–4.0 | 98 | 30 | 0.13 | 0.94 | 0.14 (0.11–0.17) | |
| 4.0–5.0 | 68 | 19 | 0.10 | 0.92 | 0.10 (0.08–0.13) |
CI, confidence interval; NSCLC, non small cell lung cancer.
a)
Observed survival rate: probability of survival all causes of death in Korean Association of Lung Cancer Registry patients,
b)
Expected survival rate: probability of expected survivors in a comparable cohort of cancer-free general population.