Table 5

Univariate analysis of overall survival from time of diagnosis in relation to patient and tumor characteristics

A. Categorical parameters
ParameternDeath%χ2P
Clinical stage at diagnosis6.80.033
 I–II685377.9
 III44100
 IV11100
Gender0.70.396
 Male453884.4
 Female272074.1
Histogenic type6.60.038
 SSM423480.9
 NM292275.9
 LMM11100
Level of invasion15.80.001
 II3133.3
 III292069.0
 IV333090.9
 V7685.7
Ulceration3.50.062
 Yes342573.5
 No383284.2
N-ras codon 610.20.671
 Mutant211466.7
 wt524484.6
B. Continuous background parameters
ParameterRHaCIbP
Age (10)c1.150.98–1.350.071
Tumor thickness (mm)d1.071.03–1.120.003
  • a RH, relative hazard.

  • b CI, confidence interval (95%).

  • c Per 10-yr increment.

  • d Per mm increment.