Table 2 Observed and net survival rates (% (95% CI)) by histological types among lung cancers diagnosed in 2004 and recruited in 10 French cancer registries
Adenocarcinoma N = 646 | Squamous cell carcinoma N = 524 | Small cell carcinoma N = 233 | |
|---|---|---|---|
Number of person-years | 1374.5 | 1020.7 | 264.8 |
Percentage of dead within 8 years | 88.5% | 88.7% | 96.6% |
Lost to follow-up at 8 years | 1.4% | 1.3% | 0.4% |
1-year survival rate | |||
Observed | 49.4% (45.5–53.2%) | 43.3% (39.0–47.5%) | 31.8% (25.9–37.8%) |
Net | 50.1% (46.2–54.0%) | 44.5% (40.1–48.8%) | 32.2% (26.2–38.3%) |
5-year survival rate | |||
Observed | 15.8% (13.1–18.8%) | 14.9% (12.0–18.1%) | 3.9% (1.9–6.9%) |
Net | 17.1% (14.1–20.2%) | 16.5% (13.1–19.9%) | 4.1% (1.6–6.7%) |
8-year survival rate | |||
Observed | 11.2% (8.9–13.8%) | 11.2% (8.7–14.1%) | 3.4% (1.6–6.4%) |
Net | 12.6% (9.8–15.4%) | 13.4% (10.1–16.7%) | 3.7% (1.1–6.3%) |