Preliminary psychometric linguistic validation of the satisfaction survey for inflatable penile implant in Spanish

TL;DR

This study validates a Spanish version of a survey to measure satisfaction with inflatable penile implants among Spanish-speaking populations.

Contribution

The study provides the first preliminary psychometric validation of a Spanish Satisfaction Survey for Inflatable Penile Implant (SSIPI).

Findings

Spanish SSIPI showed good reliability and high internal consistency across all domains.

Spanish SSIPI domains were significantly correlated with IIEF-EFD and SEAR but not with IPSS.

The survey is linguistically and culturally validated for use in diverse Spanish-speaking regions.

Abstract

Despite attempts to assess patient satisfaction with inflatable penile prosthesis (IPP) among Spanish-speaking populations, the absence of a validated, purpose-specific questionnaire in Spanish remains a significant gap.

This study aims to report the preliminary psychometric validation of Spanish Satisfaction Survey for Inflatable Penile Implant (SSIPI).

Six centers were selected to represent diverse Spanish-speaking populations in Latin America, the United States, and Spain. It included men who had IPP surgery between 6 months and 5 years ago. The translation and cultural adaptation of the SSIPI from English to Spanish followed a systematic multi-staged approach. Each participant received 4 surveys: (i) the final Spanish SSIPI, (ii) the IIEF erectile function domain (IIEF-EFD), (iii) the Self-Esteem and Relationship (SEAR) questionnaire, and (iv) the International Prostate Symptom Score (IPSS). Reliability, internal consistency, and intraclass correlation were evaluated. A convergent analysis was also used to evaluate Spanish SSIPI with SEAR and IIEF-EFD and a divergent analysis between Spanish SSIPI and IPSS.

Spanish SSIPI psychometric validation.

A total of 111 participants were enrolled in the study. The median age was 64. The majority of participants (87%) were partnered, with a median relationship duration of 96 months. The median partner age was 56. Self-reported median time since IPP implantation was 21 months, with individuals indicating that they use the implant with a median of 5 times per month. Inflatable penile prosthesis satisfaction was generally high across all domains. Spanish SSIPI showed good reliability, high consistency, and high internal reliability across all SSIPI domains. Spanish SSIPI domains had significant correlations with the IIEF-EFD and SEAR. Spanish SSIPI domains were not significantly correlated with the overall IPSS score.

Spanish SSIPI is a linguistically, culturally, and psychometrically validated patient-reported outcomes measure of satisfaction with IPP, facilitating cross-comparative analysis with previously validated English and French versions.

This study demonstrates several methodological strengths, including applying a comprehensive psychometric approach, validating across multiple centers, and using a solid methodology to validate Spanish SSIPI. However, there are limitations, particularly the underrepresentation of specific subpopulations and the omission of pre-operative erectile function assessment.

The preliminary Spanish SSIPI demonstrated robust reliability and internal consistency across diverse Spanish-speaking regions.