Table 2.
Kaplan-Meier analysis of 5-year disease-free and melanoma-specific survival
| Clinical and pathological factors | Disease-free survival | Melanoma-specific survival |
|---|---|---|
|
Age (years) |
|
|
| ≤50 |
45.3 |
64.1 |
| >50 |
28.9 |
52.2 |
|
P value |
0.0098 |
0.03 |
|
Method of diagnosis |
|
|
| Sentinel lymph node biopsy |
41.3 |
69.3 |
| Clinical |
29.2 |
43.7 |
|
P value |
0.4 |
0.004 |
|
Primary site |
|
|
| Trunk |
22.6 |
45.2 |
| Lower extremity |
41.5 |
62.7 |
| Unknown |
37.5 |
50 |
|
P value |
0.1 |
0.5 |
|
T stage |
|
|
| T1 to T2 |
52.9 |
73.5 |
| T3 |
27.8 |
47.2 |
| T4 |
41.5 |
65.8 |
|
P value |
0.2 |
0.4 |
|
Ulceration |
|
|
| No |
36.8 |
58.6 |
| Yes |
29.3 |
54.4 |
|
P value |
0.6 |
0.2 |
|
Number of positive lymph nodes |
|
|
| 1 (N1) |
41.7 |
65.5 |
| 2 or 3 (N2) |
36.4 |
54.5 |
| ≥4 (N3) |
7.1 |
14.3 |
|
P value |
0.007 |
0.0009 |
|
Extent of nodal involvement |
|
|
| Superficial |
34.9 |
55.6 |
| Superficial + deep |
19.05 |
33.3 |
| P value | 0.001 | 0.001 |