Psychometric evaluation of the endometriosis impact questionnaire (EIQ) in an Iranian population

Mirghafourvand, Mojgan; Ghavami, Vahid; Moradi, Maryam; Najmabadi, Khadijeh Mirzaii; Mollazadeh, Sanaz

doi:10.1186/s12905-024-02975-7

BMC Women's Health

Table 4 Construct validity of the items of the Endometriosis Impact Questionnaire (EIQ) with 200 women with endometriosis

From: Psychometric evaluation of the endometriosis impact questionnaire (EIQ) in an Iranian population

Items	Last 12 months		Last 1–5 years		Last 5 years
Items	Cronbach’s alpha	Item-Total Correlation	Cronbach’s alpha	Item-Total Correlation	Cronbach’s alpha	Item-Total Correlation
EIQ 1	0.88	0.68	0.87	0.64	0.85	0.52
EIQ 2	0.88	0.56	0.87	0.54	0.85	0.62
EIQ 3	0.88	0.55	0.87	0.51	0.85	0.35
EIQ 4	0.88	0.30	0.87	0.35	0.85	0.37
EIQ 5	0.88	0.67	0.87	0.61	0.85	0.67
EIQ 6	0.88	0.67	0.87	0.65	0.85	0.58
EIQ 7	0.88	0.58	0.87	0.57	0.85	0.53
EIQ 8	0.88	0.67	0.87	0.62	0.85	0.66
EIQ 9	0.88	0.73	0.87	0.69	0.85	0.73
EIQ 10	0.88	0.72	0.87	0.65	0.85	0.65
EIQ 11	0.88	0.48	0.87	0.54	0.85	0.55
EIQ 12	0.88	0.49	0.87	0.45	0.85	0.38
EIQ 13	0.88	0.38	0.87	0.48	0.85	0.37
EIQ 14	0.94	0.72	0.94	0.73	0.96	0.79
EIQ 15	0.94	0.52	0.94	0.55	0.96	0.74
EIQ 16	0.94	0.62	0.94	0.70	0.96	0.78
EIQ 17	0.94	0.68	0.94	0.73	0.96	0.81
EIQ 18	0.94	0.74	0.94	0.81	0.96	0.79
EIQ 19	0.94	0.78	0.94	0.76	0.96	0.76
EIQ 20	0.94	0.57	0.94	0.51	0.96	0.55
EIQ 21	0.94	0.78	0.94	0.78	0.96	0.81
EIQ 22	0.94	0.65	0.94	0.59	0.96	0.74
EIQ 23	0.94	0.56	0.94	0.60	0.96	0.65
EIQ 24	0.94	0.73	0.94	0.75	0.96	0.84
EIQ 25	0.94	0.72	0.94	0.78	0.96	0.88
EIQ 26	0.94	0.67	0.94	0.68	0.96	0.77
EIQ 27	0.94	0.77	0.94	0.80	0.96	0.83
EIQ 28	0.94	0.57	0.94	0.62	0.96	0.64
EIQ 29	0.94	0.74	0.94	0.81	0.96	0.83
EIQ 30	0.90	0.82	0.90	0.82	0.89	0.82
EIQ 31	0.90	0.80	0.90	0.78	0.89	0.77
EIQ 32	0.90	0.77	0.90	0.78	0.89	0.80
EIQ 33	0.90	0.76	0.90	0.76	0.89	0.67
EIQ 34	0.81	0.54	0.83	0.60	0.88	0.72
EIQ 35	0.81	0.40	0.83	0.46	0.88	0.51
EIQ 36	0.81	0.67	0.83	0.68	0.88	0.77
EIQ 37	0.81	0.69	0.83	0.69	0.88	0.74
EIQ 38	0.81	0.65	0.83	0.65	0.88	0.73
EIQ 39	0.81	0.42	0.83	0.44	0.88	0.52
EIQ 40	0.81	0.48	0.83	0.61	0.88	0.71
EIQ 41	0.82	0.63	0.86	0.72	0.92	0.84
EIQ 42	0.82	0.72	0.86	0.77	0.92	0.91
EIQ 43	0.82	0.68	0.86	0.75	0.92	0.79
EIQ 44	0.93	0.84	0.91	0.76	0.89	0.57
EIQ 45	0.93	0.84	0.91	0.81	0.89	0.69
EIQ 46	0.93	0.67	0.91	0.65	0.89	0.65
EIQ 47	0.93	0.64	0.91	0.56	0.89	0.57
EIQ 48	0.93	0.71	0.91	0.65	0.89	0.70
EIQ 49	0.93	0.84	0.91	0.81	0.89	0.58
EIQ 50	0.93	0.77	0.91	0.65	0.89	0.70
EIQ 51	0.93	0.74	0.91	0.68	0.89	0.53
EIQ 52	0.93	0.69	0.91	0.69	0.89	0.54
EIQ 53	0.93	0.81	0.91	0.76	0.89	0.74
EIQ 54	0.93	0.46	0.91	0.43	0.89	0.65
EIQ 55	0.96	0.59	0.90	0.35	0.92	0.59
EIQ 56	0.96	0.98	0.90	0.96	0.92	0.94
EIQ 57	0.96	0.96	0.90	0.77	0.92	0.75
EIQ 58	0.96	0.91	0.90	0.79	0.92	0.78
EIQ 59	0.96	0.96	0.90	0.87	0.92	0.95
EIQ 60	0.96	0.87	0.90	0.74	0.92	0.71
EIQ 61	0.12	0.10	-0.4	-0.1	-0.1	-0.1
EIQ 62	0.12	0.10	-0.4	-0.2	-0.1	-0.0
EIQ 63	0.12	-0.02	-0.4	-0.1	-0.1	-0.1

Back to article page

ISSN: 1472-6874

Contact us

Submission enquiries: bmcwomenshealth@biomedcentral.com
General enquiries: ORSupport@springernature.com