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Table 3 Cox proportional hazards model analysis of biochemical recurrence

From: Effect of pre-operative internal obturator muscle mass index in MRI on biochemical recurrence of prostate cancer patients after radical prostatectomy: a multi-center study

Parameter HR 95% CI p-value
Age (years) 0.945 0.892–1.000 0.049
IOM (mm2/cm2) (low vs. high) 0.891 0.462–1.719 0.731
BMI (kg/m2)    0.142
 ≤ Normal   
Overweight 0.880 0.379–2.042  
Obesity 0.455 0.195–1.063  
Pre-op PSA (ng/ml) 1.064 1.045–1.083  < 0.001
Prostate volume (cc) 1.016 0.990–1.042 0.226
Gleason score    0.364
 ≤ 6   
7 1.263 0.478–3.340  
8 1.473 0.317–6.844  
9 3.064 0.798–11.760  
ECE (no vs. yes) 5.551 2.011–15.322 0.001
Resection margin (– vs. +) 1.040 0.479–2.262 0.920
T-stage    0.004
T2a   
T2b 13.260 2.218–79.262  
T2c 3.157 0.609–16.373  
T3a 1.564 0.177–13.785  
T3b 4.830 0.700–33.326  
N-stage (no involvement vs. LN involvement) 0.300 0.028–3.202 0.319
M-stage (no meta vs. meta) 0.000 0.000– 0.985
  1. IOM, internal obturator muscle mass index; BMI, body mass index; pre-op PSA, pre-operative prostate-specific antigen; ECE, extracapsular extension; LN, lymph node