Evaluating the performance of the Pain Interference Index and the Short Form McGill Pain Questionnaire among Chilean injured working adults

Juan Carlos Velez, Lauren E Friedman, Clarita Barbosa, Jessica Castillo, Diana L Juvinao-Quintero, Michelle A Williams and Bizu Gelaye

PLOS ONE, 2022, vol. 17, issue 5, 1-12

Abstract: Background: Chronic pain can lead to economic instability, decreased job productivity, and poor mental health. Therefore, reliable identification and quantification of chronic pain is important for clinical diagnosis and treatment. Objective: To determine the psychometric properties of the Spanish language versions of the Pain Interference Index (PII) and the Short Form McGill Pain Questionnaire (SF-MPG) among a population of working adults who experienced injury in Santiago, Chile. Methods: A total of 1,975 participants with work-related injuries were interviewed to collect sociodemographic, occupational, and chronic pain characteristics. Construct validity and factorial structure of the PII and SF-MPG were assessed through exploratory factor analyses (EFA). Cronbach’s alpha was used to evaluate internal consistency. Results: The PII mean score was 3.84 ± 1.43 among all participants. The SF-MPG median score was 11 [IQR: 6–16] in this study population. Cronbach’s alpha for the PII was 0.90 and 0.87 for the SF-MP. EFA resulted in a one factor solution for the PII. A two-factor solution was found for the SF-MPG. The two-factors for SF-MPG were sensory and affective subscales with Cronbach’s alpha of 0.82 and 0.714, respectively. When the two scales were combined, an EFA analysis confirmed the PII and SF-MPG measure different aspects of chronic pain. Conclusions: The PII and SF-MPG had good construct validity and reliability for assessing different aspects of chronic pain among working Chilean adults.

Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0268672

DOI: 10.1371/journal.pone.0268672

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