Translation, Cross-Cultural Adaptation, and Validation of the Measure of Intermittent and Constant Osteoarthritis Pain (ICOAP) Measure into Brazilian Portuguese for Individuals with Knee Osteoarthritis
Gabriela Nascimento de Santana, Patrícia Gabrielle dos Santos, Luciano Bernardes Leite, Pedro Forte, José Eduardo Teixeira, Christiano Eduardo Veneroso, Almir Vieira Dibai-Filho, Cid André Fidelis-de-Paula-Gomes

TL;DR
This study translated and validated a pain assessment tool for knee osteoarthritis in Brazilian Portuguese, finding it reliable but with limited validity for one pain type.
Contribution
The study provides a culturally adapted and validated Brazilian Portuguese version of the ICOAP for knee osteoarthritis patients.
Findings
The ICOAP showed good internal consistency and test–retest reliability in Brazilian Portuguese.
Only the constant pain domain of the ICOAP demonstrated convergent validity.
The translated ICOAP consists of two independent domains for intermittent and constant pain.
Abstract
Background: A comprehensive understanding of chronic pain is crucial for assessing its impact on knee osteoarthritis (KOA). This study aimed to translate, cross-culturally adapt, and validate the ICOAP into Brazilian Portuguese for individuals with KOA. Methods: A total of 133 individuals with KOA participated. Phase 1 involved the translation and cross-cultural adaptation of the ICOAP into Brazilian Portuguese. In Phase 2, the pre-final version was tested, and in Phase 3, the final version was validated with 103 participants. Convergent validity was assessed using Spearman’s correlation with the Numeric Rating Pain Scale (NRPS), the International Knee Documentation Committee (IKDC), and the Short Form 36 Health Survey (SF-36). Internal structure was evaluated through exploratory and confirmatory factor analyses using fit indices: chi-square/degrees of freedom (χ2/df), root mean square…
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Taxonomy
TopicsOsteoarthritis Treatment and Mechanisms · Musculoskeletal pain and rehabilitation · Total Knee Arthroplasty Outcomes
