Table 3.

Reliability of abdominal US and urethral catheterisation for measuring PVR in the two bladder readings.

Reading	US	Catheter
First reading		108.4 (72.1)
PVR	82.3 (60.83)
Cronbach’s α	0.65
P	<0.05
Second reading		104.3 (75.58)
PVR	78.8 (68.57)
Cronbach’s α	0.68
P	<0.05