Table 1. Baseline characteristics of study cohort.
| Characteristic | Number of Patients | Percentage | Median | Range | Interquartile Range |
| Gender | |||||
| Female | 449 | 43.7 | |||
| Male | 578 | 56.3 | |||
| Age (years) | 58 | 10–86 | 44–69 | ||
| Breslow's thickness (mm) | 1.85 | 0.24–20.00 | 1.25–3.00 | ||
| Ulceration | |||||
| No | 738 | 71.9 | |||
| Yes | 289 | 28.1 | |||
| Localization | |||||
| Extremities | 500 | 48.7 | |||
| Trunk or head | 527 | 51.3 | |||
| Nodal status histopathology | |||||
| Negative | 888 | 86.5 | |||
| Positive | 139 | 13.5 | |||
| Clinical stage a | |||||
| IA | 76 | 7.4 | |||
| IB | 393 | 38.3 | |||
| IIA | 234 | 22.8 | |||
| IIB | 138 | 13.4 | |||
| IIC | 47 | 4.6 | |||
| IIIA | 73 | 7.1 | |||
| IIIB | 66 | 6.4 | |||
| DCCD | 0.5 | 0–950,000 | 0–4 |
a
Clinical stage according to the AJCC 2009 classification [4]. For nodal status only results of histopathology were taken into account. Information about mitotic rate was not available.