Table 3: Comparison of clinical variables between UTI groups after adjustment for the effect of a preoperative indwelling transurethral catheter.

No transurethral catheter n total No UTI
Median
No UTI
IQR
UTI
Median
UTI
IQR
p
Age (years) 41 68.1 63.9-74.4 78.1 70.8-81.6 < 0.01
PSA (ng/dl) 41 1.8 1.3-3.8 2.1 1.2-3.6 0.62
BMI (kg/m2) 41 25.7 23.7-28.9 25.5 24.7-28.7 0.46
PV (ml) 39 60 37.9-80.0 45 33-83 0.67
PVR (ml) 29 70 21-180 90 89-600 0.07
No UTI
n
No UTI
%
UTI
n
UTI
%
PVR > 180 ml 8 7 87.5 1 12.5 0.5
PVR > 300 ml 4 3 75 1 25 0.3
Urolithiasis 3 3 100 0 0 1.0
Diabetes 5 5 100 0 0 1.0
Transurethral catheter n total No UTI
Median
No UTI
IQR
UTI
Median
UTI
IQR
p
Age (yrs) 25 73.9 61.2-79.6 73.7 68.8-77.6 0.59
PSA (ng/dl) 23 4.8 3.3-6.9 5.5 4.3-8.9 0.91
BMI (kg/m2) 25 28.9 24.0-32.4 22.8 20.4-26.8 0.08
PV (ml) 19 60 40-80 40 37-40 0.24
PVR (ml) 23 500 400-10000 400 194-900 0.80
No UTI
n
No UTI
%
UTI
n
UTI
%
PVR > 180 ml 19 14 73.7 5 26.3 1.00
PVR > 300 ml 17 13 76.5 4 23.5 0.63
Diabetes 6 5 83.3 1 16.7 1.00

Urolithiasis omitted in subgroup of catheterised patients as there were no patients in this group. Abbreviations: BMI: Body Mass Index; PSA: Prostate Specific Antigen; PV: Prostate Volume; PVR: Postvoid Residual Volume; UTI: Urinary Tract Infection.