Cultural Adaptation and Validation of the Korean Version of the iMTA Productivity Cost Questionnaire

Abstract

This study develops the Korean version of the Institute for Medical Technology Assessment Productivity Cost Questionnaire (iPCQ) through translation/cultural adaptation and evaluation of psychometric properties. We included 110 outpatients visiting a gynecology clinic. We conducted the translation and cross-cultural adaptation of the iPCQ, including forward and back-translation, pilot test with cognitive debriefing, and finalization. We analyzed the feasibility (using average time of filling in the iPCQ and the proportion of missing values), test–retest reliability (using the intra-class correlation coefficient [ICC]), and validity (concurrent validity with the Work Productivity and Activity Impairment [WPAI] and construct validity with the 36-Item Short Form Survey [SF-36], using Spearman’s ρ). The Korean version of iPCQ showed appropriate feasibility (average filling in time was 5.0 min without missing values), and had excellent values in the domains of absenteeism, presenteeism, and unpaid work for test–retest reliability (ICC: 0.92–0.99). For concurrent validity, the Korean version of iPCQ showed moderate–high correlation for absenteeism and presenteeism with the WPAI. All domains of productivity losses measured by the Korean version of iPCQ showed negative correlation with the quality of life estimated by the SF-36. Through this study, we developed a Korean instrument that can measure and value health-related productivity losses including unpaid work as well as absenteeism and presenteeism.

The Institute for Medical Technology Assessment Productivity Cost Questionnaire (iPCQ) and the Medical Consumption Questionnaire (iMCQ): Translation and Cognitive Debriefing of the Arabic Version

“…A major strength of this study was following established guidelines in the translation and linguistic validation process. The sample size (n = 22) used for the cognitive debriefing was comparable to that in published research of a similar nature [17][18][19][20], although lower than the recommended sample size of 30-40 [14,15]. The study's major limitation is the recruitment of a highly educated sample all with a university degree.…”

“…According to guidelines, the back translations should be produced by two persons with the source language (English) as their mother tongue [ 14 ]. In our study, the back-translator’s native language was Arabic because of the scarcity of native English language official translators in our setting.…”

“…The iPCQ and iMCQ consist of 18 and 20 questions, respectively. The two questionnaires are available in different languages including Dutch, English, French, German, Norwegian [ 13 ] and Korean [ 14 ].…”

Design, Assessment, and Validation of a Questionnaire to Estimate Food-Dependent Exercise-Induced Anaphylaxis Prevalence in Latin American Population

“…The overall match between the original Spanish version and the two back-translated ones was also very high and the conflicting words were synonymous. This procedure has been evaluated qualitatively [ 33 , 34 , 35 , 36 ], but in the present and other studies, we carried out a quantitative evaluation of the translation and back translation procedure through the measurement of the overall match [ 17 ]. The high percentage of overall match between the final Spanish version of the questionnaire and the back-translated Portuguese versions of it indicates a very reduced discrepancy [ 37 ].…”