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The Spanish Version of the International Index of Erectile Function: Adaptation and Validation

Background: The International Index of Erectile Function (IIEF) is a widely employed questionnaire in urology to assess erectile dysfunction (ED) in both clinical research and practice. Objective: To translate and culturally adapt the Spanish version of the International Index of Erectile Function (...

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Autores principales: Díaz-Mohedo, Esther, Meldaña Sánchez, Antonio, Cabello Santamaría, Francisco, Molina García, Elena, Hernández Hernández, Sofía, Hita-Contreras, Fidel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9914342/
https://www.ncbi.nlm.nih.gov/pubmed/36767196
http://dx.doi.org/10.3390/ijerph20031830
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author Díaz-Mohedo, Esther
Meldaña Sánchez, Antonio
Cabello Santamaría, Francisco
Molina García, Elena
Hernández Hernández, Sofía
Hita-Contreras, Fidel
author_facet Díaz-Mohedo, Esther
Meldaña Sánchez, Antonio
Cabello Santamaría, Francisco
Molina García, Elena
Hernández Hernández, Sofía
Hita-Contreras, Fidel
author_sort Díaz-Mohedo, Esther
collection PubMed
description Background: The International Index of Erectile Function (IIEF) is a widely employed questionnaire in urology to assess erectile dysfunction (ED) in both clinical research and practice. Objective: To translate and culturally adapt the Spanish version of the International Index of Erectile Function (IIEF) and to analyze its psychometric properties in Spanish men with erectile dysfunction (ED). Methods: Firstly, direct and reverse translations were performed. Secondly, a pilot study was carried out on 23 patients with the lowest possible education level without being illiterate. Finally, 170 participants completed the IIEF. Test–retest reliability, internal consistency and construct validity (exploratory factor analysis) were assessed. Concurrent and divergent validity were evaluated with the Hospital Anxiety and Depression Scale (HADS) and the 12-item Short-Form Health Survey (SF-12), respectively. Discriminant validity (with and without anxiety or depression) was calculated using a receiver-operating characteristic curve analysis. Results: High internal consistency (Cronbach’s alpha = 0.968, total score) and moderate-to-excellent test–retest reliability were found. The factor analysis showed a two-factor structure (explained variance of 77.34%). Significant correlations of the IIEF total score (p < 0.01) and domains (p < 0.05) with HADS anxiety and depression scores were observed (concurrent validity), while non-significant correlations with SF-12 physical and mental summary scores were found (divergent validity). The IIEF total score could discriminate between participants with and without anxiety (p < 0.05) and depression (p < 0.01), with an optimal cut-off point of <39.50 for both anxiety (48.30% sensitivity and 78.75% specificity) and depression (50.00% sensitivity and 81.01% specificity). Clinical implications: The psychometric properties of the IIEF have not been analyzed in Spanish people to date. Strengths and Limitations: The Spanish version of the IIEF was shown to be capable of discriminating between men with erectile dysfunction with and without depression or anxiety. There are some limitations to this study that should be noted. It was conducted on Spanish participants, and, thus, it should be employed with caution in other Spanish-speaking countries. This study was carried out on a selected population, and, therefore, the generalizability of its results to other populations might be limited. Moreover, a large majority of the participants (89.41%) had secondary or higher education. Future studies should be performed on a more general population with a varied geographical and educational background. Conclusions: The Spanish IIEF is a valid and reliable instrument for assessing erectile function among Spanish men with ED.
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spelling pubmed-99143422023-02-11 The Spanish Version of the International Index of Erectile Function: Adaptation and Validation Díaz-Mohedo, Esther Meldaña Sánchez, Antonio Cabello Santamaría, Francisco Molina García, Elena Hernández Hernández, Sofía Hita-Contreras, Fidel Int J Environ Res Public Health Article Background: The International Index of Erectile Function (IIEF) is a widely employed questionnaire in urology to assess erectile dysfunction (ED) in both clinical research and practice. Objective: To translate and culturally adapt the Spanish version of the International Index of Erectile Function (IIEF) and to analyze its psychometric properties in Spanish men with erectile dysfunction (ED). Methods: Firstly, direct and reverse translations were performed. Secondly, a pilot study was carried out on 23 patients with the lowest possible education level without being illiterate. Finally, 170 participants completed the IIEF. Test–retest reliability, internal consistency and construct validity (exploratory factor analysis) were assessed. Concurrent and divergent validity were evaluated with the Hospital Anxiety and Depression Scale (HADS) and the 12-item Short-Form Health Survey (SF-12), respectively. Discriminant validity (with and without anxiety or depression) was calculated using a receiver-operating characteristic curve analysis. Results: High internal consistency (Cronbach’s alpha = 0.968, total score) and moderate-to-excellent test–retest reliability were found. The factor analysis showed a two-factor structure (explained variance of 77.34%). Significant correlations of the IIEF total score (p < 0.01) and domains (p < 0.05) with HADS anxiety and depression scores were observed (concurrent validity), while non-significant correlations with SF-12 physical and mental summary scores were found (divergent validity). The IIEF total score could discriminate between participants with and without anxiety (p < 0.05) and depression (p < 0.01), with an optimal cut-off point of <39.50 for both anxiety (48.30% sensitivity and 78.75% specificity) and depression (50.00% sensitivity and 81.01% specificity). Clinical implications: The psychometric properties of the IIEF have not been analyzed in Spanish people to date. Strengths and Limitations: The Spanish version of the IIEF was shown to be capable of discriminating between men with erectile dysfunction with and without depression or anxiety. There are some limitations to this study that should be noted. It was conducted on Spanish participants, and, thus, it should be employed with caution in other Spanish-speaking countries. This study was carried out on a selected population, and, therefore, the generalizability of its results to other populations might be limited. Moreover, a large majority of the participants (89.41%) had secondary or higher education. Future studies should be performed on a more general population with a varied geographical and educational background. Conclusions: The Spanish IIEF is a valid and reliable instrument for assessing erectile function among Spanish men with ED. MDPI 2023-01-19 /pmc/articles/PMC9914342/ /pubmed/36767196 http://dx.doi.org/10.3390/ijerph20031830 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Díaz-Mohedo, Esther
Meldaña Sánchez, Antonio
Cabello Santamaría, Francisco
Molina García, Elena
Hernández Hernández, Sofía
Hita-Contreras, Fidel
The Spanish Version of the International Index of Erectile Function: Adaptation and Validation
title The Spanish Version of the International Index of Erectile Function: Adaptation and Validation
title_full The Spanish Version of the International Index of Erectile Function: Adaptation and Validation
title_fullStr The Spanish Version of the International Index of Erectile Function: Adaptation and Validation
title_full_unstemmed The Spanish Version of the International Index of Erectile Function: Adaptation and Validation
title_short The Spanish Version of the International Index of Erectile Function: Adaptation and Validation
title_sort spanish version of the international index of erectile function: adaptation and validation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9914342/
https://www.ncbi.nlm.nih.gov/pubmed/36767196
http://dx.doi.org/10.3390/ijerph20031830
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