Table 1.
Baseline Characteristics of the 502 NPC Patients.a
| Characteristics | Training Set (%) | Validation Set (%) | Testing Set (%) |
|---|---|---|---|
| n = 302 | n = 100 | n = 100 | |
| Median age (range) | 46.9 (18-73) | 52.3 (12-67) | 50.7 (25-72) |
| Sex | |||
| Male | 195 (64.6%) | 73 (73%) | 69 (69%) |
| Female | 107 (35.4%) | 27 (27%) | 31 (31%) |
| T classification | |||
| T1 | 73 (24.2%) | 23 (23%) | 18 (18%) |
| T2 | 76 (25.2%) | 25 (25%) | 32 (32%) |
| T3 | 100 (33.1%) | 33 (33%) | 20 (20%) |
| T4 | 53 (17.5%) | 19 (19%) | 40 (40%) |
| N classification | |||
| N0 | 39 (12.9%) | 13 (13%) | 15 (15%) |
| N1 | 98 (32.5%) | 33 (33%) | 29 (29%) |
| N2 | 155 (51.3%) | 52 (52%) | 43 (43%) |
| N3 | 10 (3.3%) | 2 (2%) | 13 (13%) |
| Overall stage | |||
| I | 20 (6.6%) | 6 (6%) | 4 (4%) |
| II | 36 (11.9%) | 12 (12%) | 15 (15%) |
| III | 97 (32.1%) | 34 (34%) | 34 (34%) |
| IV | 149 (49.3%) | 48 (48%) | 47 (47%) |
Abbreviation: NPC, nasopharyngeal carcinoma.
a Tumor and lymph node stage were judged by the seventh edition of the American Joint Committee on Cancer (AJCC) stage criteria.