Table 1.
Clinical variables of patients with single and multiple KC.
| Single KC | Multiple KC | ||||
|---|---|---|---|---|---|
| Total Number of Patients | 7786 | 2300 | p value | ||
| Sex | p < 0.01 | ||||
| Male | 3581 | 45.99% | 1224 | 53.22% | |
| Female | 4205 | 54.01% | 1076 | 46.78% | |
| Age | p = 0.15 | ||||
| Mean | 70.16 | 71.17 | |||
| Min | 20 | 29 | |||
| Max | 102 | 87 | |||
| Location of first primary KC | p = 0.07 | ||||
| Face | 5624 | 77.97% | 1613 | 74.33% | |
| Trunk | 827 | 11.47% | 292 | 13.46% | |
| Upper limb | 210 | 2.91% | 79 | 3.64% | |
| Lower limb | 274 | 3.80% | 82 | 3.78% | |
| Scalp | 111 | 1.54% | 49 | 2.26% | |
| Neck | 167 | 2.32% | 55 | 2.53% | |
| Unknown | 573 | 130 | |||
| Type of first primary KC | p < 0.01 | ||||
| SCC | 1168 | 15.00% | 385 | 16.74% | |
| BCC | 6618 | 85.00% | 1915 | 83.26% | |
| Nodular | 1891 | 51.74% | 554 | 39.12% | |
| Superficial | 1159 | 31.71% | 456 | 32.20% | |
| Infiltrative | 489 | 13.38% | 333 | 23.52% | |
| Basosquamous | 116 | 3.17% | 73 | 5.16% | |
| Unknown BCC subtype | 2963 | 499 | |||