Estimating EQ-5D and OAB-5D health state utilities for patients with overactive bladder

Table 2 Mean utility scores of the instruments and adjusted differences between the two utility scores according to symptom frequency level

Clinical symptom	Symptom frequency level	Level definition	% per level	Mean utility (±SD) ^a	Mean utility (±SD) ^a	Difference between utilities, adjusted mean (±SD) ^a	P value ^b
Clinical symptom	Symptom frequency level	Level definition	% per level	EQ-5D	OAB-5D	Difference between utilities, adjusted mean (±SD) ^a	P value ^b
Micturitions/24 h	1	< 8	21.2	0.85 (±0.21)	0.90 (±0.08)	0.046 (±0.396)	<.0001
	2	8 - < =10	30.7	0.84 (±0.20)	0.87 (±0.09)	0.025 (±0.458)	<.0001
	3	10 - < =12	22.7	0.82 (±0.21)	0.85 (±0.09)	0.015 (±0.401)	0.0205
	4	12 - < = 14	13.2	0.80 (±0.22)	0.82 (±0.09)	0.007 (±0.325)	0.3073
	5	> 14	12.3	0.78 (±0.23)	0.80 (±0.09)	0.007 (±0.331)	0.3477
Incontinence episodes/24 h	1	0	50.3	0.85 (±0.19)	0.89 (±0.08)	0.032 (±0.470)	<.0001
	2	> 0 - < = 1	19.7	0.82 (±0.20)	0.85 (±0.09)	0.019 (±0.320)	0.0006
	3	1 - < =2	11.0	0.80 (±0.22)	0.83 (±0.09)	0.009 (±0.262)	0.1529
	4	2 - < =3	6.9	0.78 (±0.23)	0.81 (±0.09)	0.006 (±0.229)	0.4157
	5	> 3	12.2	0.76 (±0.26)	0.79 (±0.09)	0.004 (±0.290)	0.5353

^aSD: Standard deviation.
^b t- test to test the null hypothesis that the adjusted difference equals zero.

ISSN: 1477-7525