Table 1.
Association of squamous differentiation with clinical and pathological characteristics
| Characteristic | Total | Squamous differentiation-negative | Squamous differentiation-positive | p value | |
|---|---|---|---|---|---|
| Cases, n (%) | 1676 (100) | 1449 (86) | 227 (14) | ||
| Mean age (range),years | 66.4 (24–92) | 66.5 (26–92) | 65.4 (24–90) | 0.150 | |
| Gender, n (%) | M | 1376 (82) | 1186 (82) | 190 (84) | 0.499 |
| F | 300 (18) | 263 (18) | 37 (16) | ||
| M:F | 5:1 | 5:1 | 5:1 | ||
| Tumor grade, n (%) | Low | 685 (41) | 608 (42) | 77 (34) | 0.022 |
| High | 991 (59) | 841 (58) | 150 (66) | ||
| Tumor multiplicity, n (%) | No | 946 (56) | 834 (58) | 112 (49) | 0.02 |
| Yes | 730 (44) | 615 (42) | 115 (51) | ||
| Tumor size (cm), n (%) | <3 | 1089 (65) | 939 (65) | 150 (66) | 0.708 |
| ≥3 | 587 (35) | 510 (35) | 77 (34) | ||
| Lymphovascular invasion, n (%) | No | 1488 (89) | 1328 (92) | 160 (70) | <0.001 |
| Yes | 188 (11) | 121 (8) | 67 (30) | ||
| Recurrence, n (%) | No | 1245 (74) | 1090 (75) | 155 (68) | 0.026 |
| Yes | 431 (26) | 359 (25) | 72 (32) |
M male; F female