Table 2

Prognostic factors using Cox's proportional hazards model

Univariate analysisMultivariate analysis
 ratio95% CIp ValueHazard ratio95% CIp Value
A, astrocytoma; CI, confidence interval; KPS, Karnofsky performance status; OA, oligoastrocytoma; PDGFR, platelet derived growth factor receptor.
KPS (≥90 v ≤80)0.400.18 to 0.920.030.330.14 to 0.750.009
PDGFRα0.960.94 to 0.990.040.960.93 to 0.990.02
Age (>45 years v ≤45 years)1.490.72 to to 3.390.22
Preop duration of symptoms1.000.99 to 1.010.38
Side (left v right)1.350.67 to 2.700.40
Contrast enhancement1.320.66 to 2.630.44
Histology (A v OA)1.390.53 to 3.620.51
Sex (male v female)1.330.57 to 3.110.51
Epilepsy only0.910.45 to 1.850.79
Total resection0.840.36 to 1.970.69
Radiotherapy (yes v no)1.980.60 to 2.630.23