Table 1 Demographics and tumor characteristics according to the geographical area of residency
Exposed cohort (n = 194) | Unexposed cohort (n = 488) | p-value | |
|---|---|---|---|
Age, years a | 50 (37–62) | 49 (38–61) | 0.90 |
Males | 96 (49.5) | 227 (46.5) | 0.54 |
Primary site: | |||
Acral | 12 (6.2) | 28 (5.7) | 0.93 |
Head/neck | 18 (9.3) | 40 (8.2) | |
Upper limb | 43 (22.2) | 120 (24.6) | |
Trunk | 92 (47.4) | 235 (48.2) | |
Lower limb | 29 (14.9) | 65 (13.3) | |
Breslow thickness, mm ab | 0.9 (0.5–2.0) | 0.8 (0.4–1.8) | 0.23 |
Ulceration: c | |||
Absent | 144 (76.6) | 372 (79.3) | 0.51 |
Present | 44 (23.4) | 97 (20.7) | |
Presence of Mitoses d | 134 (70.5) | 284 (58.7) | 0.005 |
pTNM: | |||
I | 116 (59.8) | 325 (66.6) | 0.22 |
II | 43 (22.2) | 85 (17.4) | |
III | 35 (18.0) | 78 /16.0) | |
Subtype: e | |||
ALM | 4 (2.0) | 14 (3.0) | 0.78 |
LMM | 5 (2.7) | 7 (1.5) | |
NM | 33 (17.6) | 85 (18.1) | |
SSM | 141 (75.0) | 347 (73.8) | |
Other f | 5 (2.7) | 17 (3.6) | |