assessment of reliability and validity of Persian version of the endometriosis health profile [EHP-30]

ABSTRACT

The Endometriosis Health Profile-30 [EHP-30] is a disease-specific questionnaire to measure the health-related quality of life in patients with endometriosis. The aim of this study was to evaluate the validity and reliability of the Persian version of Endometriosis Health Profile [EHP-30] in women with endometriosis referring to three Gynecology Clinics in Tehran, Iran. One hundred women [20 to 50 years old] with surgically confirmed endometriosis recruited from three outpatient Gynecology Clinics affiliated to the Iran University of Medical Sciences. All 100 patients were asked to complete EHP-30 questionnaire while referring to the Clinics. The findings were analyzed using descriptive statistics, internal reliability consistency, construct validity [using short form-36, which had already been validated in Iran], factor analysis [with principle component analysis method], and item total correlation to assess the validity and reliability of the questionnaire. The internal consistency reliability of the questionnaire was high [Cronbach's alpha ranged between 0.80 and 0.93 for core, and 0.78 and 0.90 for modular parts]. All items were loaded on their own factors except item 17 [feeling aggressive or violent] and item 18 [feeling unwell], which were loaded on pain and social support domains, respectively. Construct validity of EHP-30, established by using SF-36, indicates good correlations in several similar scales of these two questionnaires. The findings of the study demonstrate that Persian version of EHP-30 is a valid and reliable measure to assess the quality of life in women with endometriosis