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Table. 2 Univariate and multivariate Cox hazard regressions analysis of population and clinical factors for PIH

From: Incidence and risk factors of inguinal hernia occurred after radical prostatectomy-comparisons of different approaches

Characteristic Univariate Multivariate
HR(95%CI) P HR(95%CI) P
age (years)
 20~ 1.00(Ref.) 0.172 1.00(Ref.) 0.053
 60~ 1.32 (0.27–6.29) 0.729 1.78 (0.40–7.82) 0.447
 70~ 2.33 (0.53–10.22) 0.262 2.99 (0.71–12.58) 0.134
 80~ 5.88 (0.72–47.97) 0.098 7.39 (1.18–46.39) 0.033
previous abdominal operations
 no 1.00(Ref.)    
 yes 0.95 (0.38–2.33) 0.902   
diabetes mellitus history
 no 1.00(Ref.)   1.00(Ref.)  
 yes 0.54 (0.24–1.22) 0.140 0.65 (0.32 ~ 1.30) 0.224
hypertension history
 no 1.00(Ref.)   
 yes 0.94 (0.47–1.89) 0.857
previous hernia   
 no 1.00(Ref.)  
 yes 0.82 (0.24–2.87) 0.759
preoperative Gleason
  < 7 1.00(Ref.) 0.638  
 7 0.69 (0.31–1.53) 0.358
  > 7 0.70 (0.24–2.04) 0.509
T-stage
 T1 1.00(Ref.) 0.291 1.00(Ref.) 0.043
 T2 0.54 (0.22–1.34) 0.184 0.43 (0.21–0.87) 0.020
 T3 0.41 (0.15–1.94) 0.339 0.45 (0.17–1.21) 0.115
 T4 0.13 (0.01–1.25) 0.077 0.09 (0.01–0.73) 0.025
PLND
 no 1.00(Ref.)    
 yes 1.58 (0.75–3.32) 0.23   
operative methods
 LRP 1.00(Ref.)7 0.110 1.00(Ref.) 0.009
 RALP 0.77 (0.18–3.19) 0.480 0.88 (0.21–3.69) 0.861
 RRP 2.28 (1.18–4.44) 0.053 2.93 (1.47–5.84) 0.002
operative approach
 extraperitoneal 1.00(Ref.)   1.00(Ref.)  
 transperitoneal 0.50 (0.22–1.12) 0.093 0.74 (0.40 ~ 1.39) 0.35
estimated blood loss
  < 500.0 1.00(Ref.) 0.552   
  < 1000.0 0.68 (0.29–1.59) 0.376   
  < 2000.0 0.50 (0.10–2.43) 0.390   
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