Table 2.
Comparing the distributions of histological tumour characteristics and tumour site between relapsers and non-relapsers
| Non-relapsers N (%) | Relapsers N (%) | p-Value | Relapsers excluding systemic relapsers | p-Value | |
|---|---|---|---|---|---|
| Site of primary | |||||
| Axial | 48 (33.1) | 47 (35.9) | 0.6 | 37 (31.9) | 0.8 |
| Limb | 97 (66.9) | 84 (64.1) | 79 (68.1) | ||
| Ulceration | |||||
| No | 112 (91.1) | 85 (82.5) | 0.1 | 74 (82.2) | 0.1 |
| Yes | 11 (8.9) | 18 (17.5) | 16 (17.8) | ||
| Tumour infiltrating lymphocytes | |||||
| None | 6 (4.9) | 5 (4.9) | 0.3 | 5 (5.6) | 0.4 |
| Mild | 59 (48.0) | 59 (57.3) | 52 (57.8) | ||
| Non-brisk | 31 (25.2) | 26 (25.2) | 21 (23.3) | ||
| Brisk | 27 (22.0) | 13 (12.6) | 12 (13.3) | ||
| Regression | |||||
| No | 91 (74.0) | 75 (72.8) | 0.8 | 65 (72.2) | 0.8 |
| Yes | 32 (26.0) | 28 (27.2) | 25 (27.8) | ||
| Initial incisional biopsy | |||||
| No | 124 (85.5) | 117 (90.7) | 0.2 | 104 (90.4) | 0.2 |
| Yes | 21 (14.5) | 12 (9.3) | 11 (9.6) | ||
| Vertical growth phase | |||||
| No | 10 (8.1) | 3 (2.9) | 0.1 | 3 (3.3) | 0.1 |
| Yes | 113 (91.9) | 100 (97.1) | 87 (96.7) | ||
| Mitotic ratea | |||||
| Mean (s.d.) | 2.3 (3.4) | 4.0 (5.9) | 0.01 | 4.2 (6.2) | 0.01 |
| Vessel invasionb | |||||
| No | 121 (98.4) | 97 (94.2) | 0.1 | 85 (94.4) | 0.1 |
| Yes | 2 (1.6) | 6 (5.8) | 5 (5.6) | ||
p-Value from Pearson’s chi-squared test for independence unless otherwise stated.
The number of missing data points ranges between 2 and 52 due to lack of histological information for some patients.
a
Two-tailed t-test, mean and standard deviation reported.
b
Fisher’s exact test.