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

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

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
EQ-5D OAB-5D
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
  1. aSD: Standard deviation.
  2. b t- test to test the null hypothesis that the adjusted difference equals zero.