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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

From: Are comorbidities associated with long-term survival of lung cancer? A population-based cohort study from 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%)