Table 2. Result of percutaneous and two-staged tests in the Medicare population 1997-2007.

	Number of perc test procedures	Total perc success %	Failed perc no 2-stage %	Failed perc with successful 2-stage %	Failed both %	P value	Number of 2-stage tests	Successful 2-stage with no perc %	Failed 2-stage no perc %	P value	Overall success rate %	P value
Diagnosis:
NGB	16	50.0	37.5	0	12.5	0.09	32	56.3	43.8	<0.0001	54.2	<0.0001
IC	9	66.7	22.2	11.1	0		30	36.7	60.0		47.4
Retention	49	42.9	42.9	8.2	6.1		92	46.7	48.9		49.6
“wet” OAB	160	51.3	39.4	6.3	3.2		435	46.4	51.3		50.3
“dry” OAB	111	39.6	54.1	5.4	0.9		233	40.8	56.6		42.9
other	13	23.1	76.9	0	0		310	10.3	89.7		10.8
Age:
<65	62	53.2	38.7	8.1	0	0.64	272	40.1	58.1	0.034	44.7	0.0038
65-69	74	36.4	51.4	6.8	5.4		196	30.6	66.8		34.7
70-74	70	42.8	52.9	4.3	0		201	44.8	53.7		45.9
75-79	70	54.3	38.6	2.9	4.3		210	37.6	61.4		42.8
80-84	57	43.9	43.9	7.0	5.3		162	25.9	71.6		33.0
85-89	19	47.4	36.8	10.5	5.3		70	24.3	72.9		32.2
90-94	5	40.0	60.0	0	0		19	21.1	78.9		25.0
95+	1	0	100	0	0		2	0	100		0
Race/ethnicity:
Unknown	3	66.7	33.3	0	0	0.019	4	25.0	75.0	0.76	42.9	0.47
Caucasian	332	46.7	44.2	6.0	3.0		1028	35.3	62.7		40.1
AA	12	25.0	75.0	0	0		57	40.4	59.6		37.7
Other	5	20.0	80.0	0	0		15	40.0	60.0		35.0
Asian	2	0	50.0	0	50.0		4	50.0	50.0		33.3
Hispanic	4	75.0	0	25.0	0		17	35.3	58.8		50.0
NA Native	0	-	-	-	-		7	0	100		0
Sex:
Male	96	29.2	59.3	5.2	6.3	0.0004	298	27.2	71.1	0.002	29.3	<0.0001
Female	262	51.9	40.1	6.1	1.9		834	38.4	59.7		43.7
Total:	358	45.8	45.3	5.9	3.1		1132	35.4	62.7		39.9

perc=percutaneous, NGB=neurogenic bladder, IC=interstitial cystitis, “wet” OAB= overactive bladder with urgency incontinence, “dry” OAB= overactive bladder with no incontinence, AA=African American, NA= North American