Table 1.
Baseline and clinical pathological features of all patients.
| Variables | Level | All cohorts (n = 525) |
Training cohort (n = 366) |
Validation cohort (n = 159) |
|---|---|---|---|---|
| Age (%) | 0–49 | 132 (25.14) | 94 (25.68) | 38 (23.90) |
| 50–70 | 245 (46.67) | 165 (45.08) | 80 (50.31) | |
| >70 | 148 (28.19) | 107 (29.23) | 41 (25.79) | |
| Race (%) | White | 424 (80.76) | 297 (81.15) | 127 (79.87) |
| Black | 59 (11.24) | 39 (10.66) | 20 (12.58) | |
| Others | 42 (8.00) | 30 (8.20) | 12 (7.55) | |
| Sex (%) | Male | 277 (52.76) | 194 (53.01) | 83 (52.20) |
| Female | 248 (47.24) | 172 (46.99) | 76 (47.80) | |
| Marriage (%) | Unmarried | 194 (36.95) | 138 (37.70) | 56 (35.22) |
| Married | 331 (63.05) | 228 (62.30) | 103 (64.78) | |
| Histology (%) | Squamous carcinoma | 222 (42.29) | 155 (42.35) | 67 (42.14) |
| ACC | 150 (28.57) | 106 (28.96) | 44 (27.67) | |
| Others | 153 (29.14) | 105 (28.69) | 48 (30.19) | |
| Stage (%) | Localized | 265 (50.48) | 185 (50.55) | 80 (50.31) |
| Regional | 209 (39.81) | 146 (39.89) | 63 (39.62) | |
| Distant | 51 (9.71) | 35 (9.56) | 16 (10.06) | |
| Radiotherapy (%) | Performed | 309 (58.86) | 218 (59.56) | 91 (57.23) |
| NO | 216 (41.14) | 148 (40.44) | 68 (42.77) | |
| Chemotherapy (%) | Performed | 108 (20.57) | 74 (20.22) | 34 (21.38) |
| NO | 417 (79.43) | 292 (79.78) | 125 (78.62) | |
| Tumor size (%) | <2 cm | 111 (21.14) | 81 (22.13) | 30 (18.87) |
| 2–5 cm | 214 (40.76) | 151 (41.26) | 63 (39.62) | |
| >5 cm | 44 (8.38) | 33 (9.02) | 11 (6.92) | |
| Unknown | 156 (29.71) | 101 (27.60) | 55 (34.59) |
ACC = adenoid cystic carcinoma.