Table 1. Characteristics of stage IA SCLC patients.
| Variables | Case | 5-year OS (%) | Pa | Multivariate analysis | ||
|---|---|---|---|---|---|---|
| HR | 95% CI | Pb | ||||
| Age (years) | ||||||
| ≤65 | 221 (32.2) | 49.5 | <0.001 | Reference | <0.001 | |
| >65 | 465 (67.8) | 31.1 | 1.656 | 1.312–2.089 | ||
| Gender | ||||||
| Male | 312 (45.5) | 34.7 | 0.060 | Reference | 0.209 | |
| Female | 374 (54.5) | 39.1 | 0.878 | 0.716–1.076 | ||
| Location | ||||||
| Upper | 430 (62.7) | 36.9 | 0.984 | |||
| Middle | 54 (7.9) | 38.8 | ||||
| Lower | 202 (29.4) | 38.5 | ||||
| Lateral | ||||||
| Left | 282 (41.1) | 39.6 | 0.851 | |||
| Right | 404 (58.9) | 35.5 | ||||
| T status | ||||||
| T1a | 68 (9.9) | 47.3 | 0.039 | Reference | 0.213 | |
| T1b | 327 (47.7) | 34.4 | 1.385 | 0.925–2.074 | ||
| T1c | 291 (42.4) | 39.3 | 1.229 | 0.813–1.856 | ||
| Therapy | ||||||
| CRT alone | 349 (50.9) | 24.7 | <0.001 | Reference | <0.001 | |
| Surgery | 337 (49.1) | 50.0 | 0.495 | 0.401–0.611 | ||
a, univariate Cox analysis; b, multivariate Cox analysis. SCLC, small-cell lung cancer; OS, overall survival; HR, hazard ratio; CI, confidence interval; CRT, chemoradiotherapy.