Development of the Incontinence Utility Index: estimating population-based utilities associated with urinary problems from the Incontinence Quality of Life Questionnaire and Neurogenic Module

Table 1 Summary of Rasch outputs

Item	Measure	Infit MeanSq	Outfit MeanSq	Pt. measure correlation	Etiology DIF*		Sex DIF
Item	Measure	Infit MeanSq	Outfit MeanSq	Pt. measure correlation	Contrast	p	Contrast	p
I-QOL01	0.17	1.04	1.12	0.48	0.60	0.000	−0.47	0.000
I-QOL02	−1.07	1.25	1.33	0.50	0.23	0.002	−0.29	0.000
I-QOL03	−0.85	1.23	1.32	0.51	0.59	0.000	−0.41	0.000
I-QOL04	0.26	1.05	1.19	0.47	0.60	0.000	−0.40	0.000
I-QOL05	−0.29	0.97	1.01	0.55	−0.25	0.001	0.10	0.209
I-QOL06	−0.15	0.88	0.83	0.59	0.00	1.000	0.14	0.060
I-QOL07	0.22	0.74	0.70	0.61	−0.04	0.595	0.00	1.000
I-QOL08	−0.32	1.09	1.12	0.51	−0.35	0.000	0.27	0.000
I-QOL09	0.51	0.75	0.74	0.60	0.16	0.056	−0.05	0.557
I-QOL10	0.22	0.94	0.97	0.52	0.76	0.000	−0.53	0.000
I-QOL11	0.25	0.86	0.83	0.56	−0.21	0.013	0.19	0.029
I-QOL12	0.27	1.01	1.10	0.49	0.18	0.025	−0.09	0.230
I-QOL13	−0.12	1.10	1.12	0.49	0.33	0.000	−0.19	0.010
I-QOL14	0.44	0.72	0.68	0.61	0.00	1.000	−0.03	0.761
I-QOL15	−0.29	0.92	0.92	0.58	0.12	0.103	0.00	1.000
I-QOL16	−0.46	0.82	0.81	0.62	−0.06	0.432	0.00	1.000
I-QOL17	−0.12	0.75	0.72	0.63	0.00	1.000	0.00	1.000
I-QOL18	0.76	0.75	0.69	0.57	−0.22	0.017	0.00	1.000
I-QOL19	0.91	0.95	0.82	0.48	−0.20	0.054	0.13	0.195
I-QOL20	0.46	0.94	0.92	0.51	−0.06	0.521	−0.08	0.376
I-QOL21	−0.45	0.98	0.96	0.57	0.13	0.075	−0.11	0.132
I-QOL22	−0.47	1.24	1.37	0.48	−0.43	0.000	0.29	0.000
Neurog1†	−0.26	1.20	1.29	0.47	0.00	1.000	0.00	1.000
Neurog2	−0.23	1.33	1.61	0.42	−0.61	0.000	0.57	0.000
Neurog3	0.95	1.06	0.99	0.42	−0.24	0.025	0.18	0.099
Neurog4	−0.51	1.56	1.85	0.39	−0.57	0.000	0.51	0.000
Neurog5	0.15	1.14	1.16	0.46	−0.11	0.128	−0.12	0.096

ISSN: 1477-7525