Cross-cultural adaptation and validation of the knee and hip health-related quality of life (OAKHQoL) in a Moroccan Arabic-speaking population

Abstract

The aim of this study was to adapt the knee and hip osteoarthritis quality of life questionnaire (OAKHQoL) into Moroccan Arabic and to determine its psychometric properties. After translation, back-translation and pretesting, the translated version was submitted to an expert committee. The psychometric properties were tested on patients with hip or knee osteoarthritis. Internal consistency was tested using Cronbach's alpha coefficient (α), and the test-retest reliability using intraclass correlation coefficients (ICC). Construct validity was assessed by examining item-convergent and divergent validity and by comparing the average scores between age groups and walk perimeter groups. The study was conducted on 131 patients (115 with osteoarthritis of the knee and 16 with osteoarthritis of the hip). The "physical activities" (α = 0.93), "mental health" (α = 0.84) and "pain" (α = 0.88) dimensions of the Arabic version were internally reliable. The ICC were adequate to good; 0.83 for "physical activities", 0.65 for "mental health" and 0.70 for "pain" dimensions. The instrument demonstrated good construct validity; all items exceeded the 0.4 criterion for convergent validity, except items 13 and 41 and most of the correlations between items and their own scale were significantly higher than their correlations with other scales. A semantically equivalent translation has been developed with cultural adaptation of OAKHQoL. It is quite reliable and a valid measure of the effect of osteoarthritis on the quality of life on Moroccan patients.

Psychometric examination of the Persian version of Osteoarthritis Knee and Hip Quality of Life questionnaire

“…Our results on the convergent validity of the questionnaire are comparable to other studies . Gonzalez Saenz de Tejada et al .…”

“…Perhaps rewording this item as ‘defining social projects in working with others’ would more clearly place it in the social activities domain. A low internal consistency for this domain has been reported by other researchers …”

“…We assessed several indicators of validity in order to compare our results to previous research on the questionnaire. The construct validity in prior studies mostly focused on the relationships between the scores of the OAKHQOL to other QoL tools such as the WOMAC, SF‐36 and EQ‐5D . We also evaluated the factor structure of the OAKHQOL.…”

“…If half of the scores on a dimension are missing, that dimension is omitted . Psychometric properties of the OAKHQOL have been documented in previous studies …”

The Mini-OAKHQOL for knee and hip osteoarthritis quality of life was obtained following recent shortening guidelines

“…It was developed on the basis of a structured conceptual model, derived from the International Classification of Functioning and Health framework [5], and using a careful methodological approach to capture the most important aspects of HRQoL that matter to lower limb OA patients. The strong measurement properties (reliability, validity and sensitivity to change) of the OAKHQOL questionnaire have been documented for several languages (French, English, Spanish, Arabic) [3,4,6,7] and using item response theory analysis [8]. It is increasingly being used throughout the world in clinical and epidemiological studies, and in clinical practice.…”