Table 3.

UF vs RUG/VCUG findings

	% Sensitivity	% Specificity	% PPV	% NPV
Flow rate (ml/sec):
Less than 10	54	93	73	86
Less than 15	76	84	61	91
Less than 20	92	67	48	96
Obstructive voiding curve:	93	84	71	97
+ Flow rate less than 10 ml/sec	54	94	76	86
+ Flow rate less than 10 ml/sec   + symptoms	51	98	90	86
Symptoms:	87	88	71	95
+ Obstructive voiding curve	76	96	87	92
± Obstructive voiding curve	99	80	61	99