Knee osteoarthritis pre-screening questionnaire (KOPS): cross-cultural adaptation and measurement properties of the brazilian version-KOPS Brazilian version

Francis Trombini-Souza; Ingrid Macedo; Flávia Yázigi; Diogo Veiga; Filomena Carnide; Margarida Espanha; George Oliveira; Claudia Goldenstein-Schainberg; Ricardo Fuller

doi:10.1186/s42358-022-00274-z

Knee osteoarthritis pre-screening questionnaire (KOPS): cross-cultural adaptation and measurement properties of the brazilian version-KOPS Brazilian version

Adv Rheumatol. 2022 Nov 4;62(1):40. doi: 10.1186/s42358-022-00274-z.

Authors

Francis Trombini-Souza^{1

2}, Ingrid Macedo³, Flávia Yázigi⁴, Diogo Veiga⁴, Filomena Carnide⁴, Margarida Espanha⁴, George Oliveira⁵, Claudia Goldenstein-Schainberg⁶, Ricardo Fuller⁶

Affiliations

¹ Department of Physical Therapy, University of Pernambuco, Petrolina, Brazil. francis.trombini@upe.br.
² Master's and Doctoral Programs in Rehabilitation and Functional Performance, University of Pernabuco, Petrolina, Brazil. francis.trombini@upe.br.
³ Department of Physical Therapy, University of Pernambuco, Petrolina, Brazil.
⁴ CIPER, Faculdade de Motricidade Humana, Universidade of Lisboa, Cruz Quebrada, Portugal.
⁵ University Hospital of Federal University of São Francisco Valley, Petrolina, Brazil.
⁶ Rheumatology Division, School of Medicine, University of São Paulo, São Paulo, Brazil.

PMID: 36333769
DOI: 10.1186/s42358-022-00274-z

Abstract

Background: Despite the criteria already established for the classification of knee osteoarthritis (OA), a radiographic and/or clinical knee OA diagnosis usually occurs in cases of fully manifest or more advanced disease, which can make health promotion, prevention, and functional rehabilitation in more advanced stages of the disease less effective. In addition, radiographic knee OA can generate more financial costs for health services. Therefore, developing and validating screening instruments to assess the probability of development and progression of knee OA would be of great value for both clinical practice and science.

Objective: To cross-culturally adapt and investigate the measurement properties of the Knee OA Pre-screening Questionnaire Brazilian version.

Methods: A total of 250 individuals of both sexes aged between 35 and 92 years [(mean (standard deviation): 63 (11) years old; 74.1 (15.1) kg; 1.59 (0.09) m; 29.38 (5.44) kg/m²] participated in this study. The cross-cultural adaptation and analyses of the measurement properties of the KOPS Brazilian version included: (1) assessment of conceptual and item equivalence; (2) assessment of semantic equivalence; (3) assessment of operational equivalence; and (4) assessment of measurement equivalence, reliability, and validity.

Results: Cronbach's alpha for the internal consistency among the six components of the KOPS Brazilian version was 0.71. The test-retest 72 h apart for each component resulted in a coefficient correlation intraclass ranging from 0.74 to 1.00. The probability of an individual randomly chosen from the population having KL ≥ 1 and KOPS Brazilian version ≥ 21 points was 0.74 (area under the curve of the Receiver Operating Characteristic - AUC of ROC); furthermore, the AUC for KL ≥ 2 and the KOPS Brazilian version ≥ 23 points was 0.77.

Conclusion: The KOPS Brazilian version is a reliable and valid instrument for early screening of knee OA in individuals aged 35 years and over in the Brazilian context.

Keywords: Cross-cultural adaptation; Knee; Measurement properties; Osteoarthritis; Validation.

MeSH terms

Adult
Aged
Aged, 80 and over
Brazil
Child
Cross-Cultural Comparison
Female
Humans
Male
Middle Aged
Osteoarthritis, Knee* / diagnostic imaging
Reproducibility of Results
Surveys and Questionnaires