The Assessment of Reliability and Validity of Persian Version of the Endometriosis Health Profile (EHP-30)

Marzieh Nojomi, Bita Bijari, Rozita Akhbari, Marayam Kashanian
In: Iranian Journal of Medical Sciences, Vol 36, Iss 2, Pp 84-89 (2011) · 2011 · W4365140665
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This study evaluated the Persian version of the Endometriosis Health Profile (EHP-30) and found it to be a valid and reliable tool for assessing quality of life in Iranian women with endometriosis.

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This study evaluated the reliability and validity of the Persian-language version of the disease-specific Endometriosis Health Profile (EHP-30) in 100 women aged 20–50 with surgically confirmed endometriosis recruited from three gynecology clinics in Tehran, Iran. Participants completed the EHP-30, and the investigators assessed internal consistency (Cronbach’s alpha), construct validity against the already-validated SF-36 short form, factor structure via factor analysis, and item–total correlations. The Persian EHP-30 showed high internal reliability (Cronbach’s alpha about 0.80–0.93 for core and 0.78–0.90 for modular parts), with most items loading on expected factors except items 17 and 18, and several domains demonstrating good correlations with SF-36. This paper is centrally about endometriosis — specifically, it validates the Persian EHP-30 questionnaire for assessing health-related quality of life in women with endometriosis.

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Abstract

Background: 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. Methods: 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. Results: The internal consistency reliability of the questionnaire was high (Cronbach’s α 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. Conclusion: 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
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Iranian Journal of Medical Sciences (Jun 2011) The Assessment of reliability and validity of Persian Version of the Endometriosis Health Profile (EHP-30) Abstract Background: 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. Methods: 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. Results: The internal consistency reliability of the questionnaire was high (Cronbach’s α 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. Conclusion: 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

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Outcome instruments

EHP-30

Condition tags

endometriosis

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