Table 1 Clinical characteristics of the patients from different cohorts
Characteristics | Training cohort (N  = 48) | Validation cohort (N  = 148) |
|---|---|---|
Age, year | ||
 < 60 | 27 (56.25%) | 79 (53.38%) |
 ≥ 60 | 21 (43.75%) | 69 (46.62%) |
Sex | ||
 Male | 43 (89.58%) | 116 (78.38%) |
 Female | 5 (10.42%) | 32 (21.62%) |
Smoking history | ||
 Yes | 33 (68.75%) | 92 (62.16%) |
 No | 15 (31.25%) | 56 (37.84%) |
SCLC staging | ||
 I | 8 (16.67%) | 54 (36.49%) |
 II | 8 (16.67%) | 48 (32.43%) |
 III | 31 (62.50%) | 46 (31.08%) |
 IV | 1 (2.08%) | 0 (0.00%) |
OS state | ||
 Alive | 25 (52.08%) | 68 (45.95%) |
 Death | 23 (47.92%) | 80 (54.05%) |