Table 1 Comparison of the different characteristics between patients in the primary and validation cohorts
From: A nomogram for predicting survival of head and neck mucosal melanoma
Characteristic | Number of patients (%) | P-value | |
|---|---|---|---|
Primary patients (n = 300) | Validation cohort (n = 182) | ||
Gender | 0.944 | ||
Male | 182 (60.7) | 111 (61.0) | |
Female | 118 (39.3) | 77 (39.0) | |
Age (years old) | 0.373 | ||
< 60 | 174 (58.0) | 98 (53.8) | |
≥ 60 | 126 (42.0) | 84 (46.2) | |
Smoking | 0.064 | ||
No | 220 (73.3) | 119 (65.4) | |
Yes | 80 (26.7) | 63 (34.6) | |
Primary site | 0.753 | ||
Others | 44 (14.7) | 23 (12.6) | |
Nasal cavity | 159 (53.0) | 100 (54.9) | |
Paranasal sinus | 24 (8.0) | 11 (6.0) | |
Oral cavity | 73 (24.3) | 48 (26.4) | |
8th T stage | 0.966 | ||
T3 | 121 (40.3) | 73 (40.1) | |
T4a | 129 (43.0) | 77 (42.3) | |
T4b | 50 (16.7) | 32 (17.5) | |
8th N stage | 0.604 | ||
N0 | 224 (74.7) | 132 (72.5) | |
N1 | 76 (25.3) | 50 (27.5) | |
Surgery | 0.933 | ||
No | 21 (7.0) | 13 (7.1) | |
Yes | 170 (56.7) | 100 (54.9) | |
Reoperation | 109 (36.3) | 69 (37.9) | |
Radiotherapy | < 0.001 | ||
No | 179 (59.7) | 129 (70.9) | |
2D | 22 (7.3) | 22 (12.1) | |
IMRT | 99 (33.0) | 31 (17.0) | |
Chemotherapy | 0.377 | ||
No | 131 (43.7) | 87 (47.8) | |
Yes | 169 (56.3) | 95 (52.2) | |
Immunotherapy | 0.659 | ||
No | 217 (72.3) | 135 (74.2) | |
Yes | 83 (27.7) | 47 (25.8) | |