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. 2013 Feb 4;11:36. doi: 10.1186/1477-7819-11-36

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