Cross-cultural adaptation and validation of the French version of the Expanded Prostate cancer Index Composite questionnaire for health-related quality of life in prostate cancer patients

Anota, Amélie; Mariet, Anne-Sophie; Maingon, Philippe; Joly, Florence; Bosset, Jean-François; Guizard, Anne-Valérie; Bittard, Hugues; Velten, Michel; Mercier, Mariette

doi:10.1186/s12955-016-0571-y

Table 4 Mutitrait matrix with correlation of each item and the domain-specific HRQoL subscales and summary scores

From: Cross-cultural adaptation and validation of the French version of the Expanded Prostate cancer Index Composite questionnaire for health-related quality of life in prostate cancer patients

Domain	Subscale	Items	Urinary domain	Urinary Function	Urinary Bother	Bowel domain	Bowel Function	Bowel Bother	Sexual domain	Sexual Function	Sexual Bother	Hormonal domain	Hormonal Function	Hormonal Bother
Urinary	Function	q23	0.48	0.59	0.56	0.38	0.27	0.36	0.29	0.28	0.06	0.32	0.30	0.29
		q24	0.15	−0.04	0.21	0.16	0.06	0.19	0.03	0.03	0.02	0.03	−0.03	0.08
		q25	0.43	0.21	0.40	0.42	0.41	0.32	0.11	0.11	0.01	0.22	0.20	0.16
		q26	0.58	0.63	0.50	0.43	0.32	0.39	0.32	0.33	0.02	0.27	0.31	0.21
		q27	−0.50	−0.63	−0.40	−0.31	−0.30	−0.24	−0.26	−0.25	−0.07	−0.37	−0.40	−0.30
	Bother	q28	−0.60	−0.72	−0.45	−0.34	−0.30	−0.30	−0.29	−0.26	−0.10	−0.33	−0.33	−0.29
		q29	−0.54	−0.46	−0.50	−0.48	−0.36	−0.46	−0.13	−0.08	−0.11	−0.32	−0.25	−0.30
		q30	−0.28	−0.19	−0.28	−0.19	−0.01	−0.25	−0.03	−0.03	−0.03	−0.23	−0.14	−0.27
		q31	−0.58	−0.35	−0.62	−0.46	−0.35	−0.45	−0.17	−0.12	−0.14	−0.32	−0.26	−0.32
		q32	−0.59	−0.32	−0.65	−0.42	−0.32	−0.37	−0.25	−0.26	−0.07	−0.37	−0.32	−0.36
		q33	0.56	−0.32	−0.60	−0.33	−0.27	−0.27	−0.26	−0.23	−0.13	−0.29	−0.21	−0.28
		q34	−0.75	−0.52	−0.74	−0.43	0.31	−0.42	−0.27	−0.24	−0.11	−0.39	−0.36	−0.36
Bowel	Function	q42	0.23	0.23	0.22	0.28	0.24	0.27	0.16	0.16	0.02	0.13	0.20	0.12
		q43	0.31	0.40	0.25	0.50	0.34	0.51	0.10	0.06	0.05	0.33	0.29	0.30
		q44	−0.25	−0.14	−0.25	−0.32	−0.23	−0.32	−0.08	−0.10	0.03	−0.28	−0.20	−0.30
		q45	−0.15	−0.13	−0.14	−0.17	−0.17	−0.18	−0.17	−0.19	0.02	−0.10	−0.11	−0.10
		q46	−0.36	−0.34	−0.33	−0.48	−0.40	−0.45	−0.23	−0.20	−0.08	−0.30	−0.26	−0.29
		q47	−0.11	−0.12	−0.11	−0.19	−0.17	−0.19	−0.09	−0.10	0.02	−0.06	−0.12	−0.02
		q48	0.38	0.30	0.33	0.49	0.42	0.44	0.10	0.05	0.07	0.13	0.23	0.07
	Bother	q49	−0.42	−0.35	−0.39	−0.69	−0.51	−0.62	−0.27	−0.24	−0.08	−0.3	−0.22	−0.34
		q50	−0.49	−0.44	−0.48	−0.67	−0.52	−0.64	−0.29	−0.24	−0.14	−0.36	−0.28	−0.37
		q51	−0.30	−0.18	−0.34	−0.53	−0.36	−0.55	−0.16	−0.19	−0.15	−0.24	−0.15	−0.30
		q52	−0.39	−0.39	−0.35	−0.56	−0.38	−0.60	−0.06	0.01	−0.09	−0.27	−0.19	−0.30
		q53	−0.35	−0.27	−0.36	−0.31	−0.40	−0.38	−0.09	−0.02	−0.12	−0.24	−0.17	−0.28
		q54	−0.35	−0.27	−0.36	−0.57	−0.40	−0.55	−0.09	−0.02	−0.12	−0.24	−0.17	−0.28
		q55	−0.37	−0.32	−0.33	−0.61	−0.50	−0.58	−0.21	−0.13	−0.18	−0.36	−0.26	−0.37
Sexual	Function	q56	0.28	0.30	0.22	0.23	0.24	0.15	0.56	0.76	−0.23	0.14	0.22	0.10
		q57	0.28	0.32	0.23	0.25	0.22	0.20	0.83	0.89	0.09	0.12	0.18	0.10
		q58	0.30	0.29	0.26	0.22	0.22	0.17	0.72	0.86	−0.04	0.15	0.20	0.13
		q59	0.33	0.37	0.27	0.25	0.22	0.20	0.71	0.83	−0.06	0.14	0.17	0.14
		q60	0.29	0.32	0.24	0.24	0.19	0.17	0.76	0.85	0.02	0.09	0.11	0.08
		q61	0.33	0.29	0.31	0.25	0.27	0.18	0.52	0.60	−0.05	0.14	0.19	0.14
		q62	0.27	0.28	0.22	0.22	0.20	0.17	0.69	0.80	−0.04	0.11	0.16	0.09
		q63	0.22	0.27	0.17	0.19	0.18	0.14	0.69	0.83	−0.07	0.06	0.11	0.05
		q64	0.23	0.26	0.20	0.24	0.20	0.17	0.79	0.91	−0.02	0.07	0.11	0.05
	Bother	q65	−0.11	<0.01	−0.14	−0.12	−0.04	−0.16	−0.22	0.09	−0.90	−0.23	−0.09	−0.24
		q66	−0.13	−0.04	−0.16	−0.13	−0.05	−0.16	−0.27	0.06	−0.91	−0.25	−0.14	−0.26
		q67	−0.09	−0.05	−0.08	−0.08	<0.01	−0.14	−0.25	0.07	−0.88	−0.27	−0.13	−0.29
		q68	−0.19	−0.07	−0.22	−0.16	−0.07	−0.18	−0.30	−0.04	−0.75	−0.23	−0.18	−0.20
Hormonal	Function	q69	0.16	0.16	0.16	0.13	0.20	0.05	0.22	0.28	−0.05	0.31	0.11	0.36
		q70	0.23	0.12	0.22	0.01	0.19	0.01	−0.10	0.01	−0.05	0.15	0.22	0.09
		q71	0.20	0.21	0.22	0.26	0.20	0.25	0.10	−0.02	0.24	0.46	0.23	0.53
		q72	0.40	0.29	0.37	0.31	0.23	0.28	0.17	0.07	0.21	0.51	0.34	0.54
		q73	−0.08	−0.04	−0.05	0.08	0.08	0.06	0.04	0.06	−0.06	0.03	0.08	−0.02
	Bother	q74	−0.19	−0.11	−0.19	−0.09	−0.12	−0.03	−0.20	−0.16	−0.15	−0.43	−0.48	−0.27
		q75	−0.25	−0.09	−0.30	−0.10	−0.16	−0.09	0.03	0.05	<0.01	−0.11	−0.21	−0.05
		q76	−0.17	−0.07	−0.20	−0.12	−0.08	−0.15	0.05	0.10	0.01	−0.17	−0.05	−0.25
		q77	−0.30	−0.23	−0.28	−0.40	−0.26	−0.45	−0.10	0.02	−0.26	−0.58	−0.54	−0.54
		q78	−0.40	−0.32	−0.37	−0.41	−0.30	−0.42	−0.21	−0.08	−0.31	−0.64	−0.58	−0.60
		q79	−0.24	−0.16	−0.28	−0.23	−0.15	−0.23	−0.17	−0.10	−0.18	−0.33	−0.40	−0.23

Values in bold for item own-scale correlation and item own-domain correlation correspond to items respecting convergent validity, i.e., correlation >0.4 in absolute value. Values in bold for correlation between an item and other scale scores correspond to items that did not respect discriminant validity, i.e., correlation between the item and the other scale scores was greater than that between the item and its own-scale score

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