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| Radiation pneumonitis | Younger group (n=482) | Older group (n=267) | P value |
|---|---|---|---|
| Symptomatic RP (grade 2–5) | 91 (18.9%) | 43 (16.1%) | P=0.396 |
| Severe RP (grade 3–5) | 30 (6.2%) | 21 (7.9%) | P=0.482 |
| Fatal RP (grade 5) | 8 (1.7%) | 12 (4.5%) | P=0.039* |
*, P<0.05. RP, radiation pneumonitis.
