Table 2.

Cox-Regression Analyses Considering Biochemical Recurrence of Prostate Cancer

Patient and treatment-related parameters	HR (95% CI)	p-value
iPSA in ng/ml (< 10, 10–20, > 20)	3.257 (0.480, 22.121)	0.227
Gleason score in biopsy (< 7, 7, or > 7)	0.811 (0.300, 2.194)	0.68
clinical T stage (2, 3, 4)	1.468 (0.389, 5.545)	0.571
Volume DIL-imaging (continuous)	1.021 (0.897, 1.162)	0.755
Age in years (continuous)	1.143 (0.945, 1.383)	0.169
Usage of ADT (0, 1, 2)	0.738 (0.240, 2.270)	0.596
Prescription dose in Gy (continuous)	1.08 (0.280, 4.165)	0.911
Arc-based IMRT technique (TOMO, VMAT)	0.028 (0.000, 85.116)	0.382

Abbreviations: ADT, Androgen Deprivation; DIL, Dominant Intraprostatic Lesion; Gy, Gray; IMRT, Intensity Modulated Radiation Therapy; iPSA, initial Prostate Specific Antigen; VMAT, Volumetric Modulated Arc Therapy