Translation and validation of European organization for research and treatment of cancer quality of life Questionnaire -C30 into Moroccan version for cancer patients in Morocco

Abstract

BackgroundUnderstanding the effects of cancer on the quality of life of affected patients is critical to clinical research as well as to optimal management and care. The aim of this study was to adapt the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire-C30 (EORTC QLQ-C30) questionnaire into Moroccan Arabic and to determine its psychometric properties. After translation, back translation and pretesting of the pre-final version, the translated version was submitted to a committee of professionals composed by oncologists and epidemiologists. The psychometric properties were tested in patients with cancer. Internal consistency was tested using Cronbach’s alpha and the test-retest reliability using interclass correlation coefficients. Construct validity was assessed by examining item-convergent and divergent validity. It was also tested using Spearman’s correlation between QLQ-C30 scales and EQ-5D.ResultsThe study was conducted in 125 patients. The Moroccan version was internally reliable, Cronbach’s α was 0.87 for the total scale and ranged from 0.34 to 0.97 for the subscales. The intraclass correlation coefficient of the test-retest reliability ranged from 0.64 for “social functioning” to 0.89 for “physical activities” subscales. The instrument demonstrated a good construct and concomitant validity.ConclusionsWe have developed a semantically equivalent translation with cultural adaptation of EORTC QLQ-C30 questionnaire. The assessment of its measurement properties showed that it is quite reliable and a valid measure of the effect of cancer on the quality of life in Moroccan patients.

Prevalence and factors affecting the level of depression, anxiety, and stress in hospitalized patients with a chronic disease

“…The back‐translated English questionnaire was subsequently compared with the original English one, by the expert committee, aiming to discern discrepancies and to solve any inconsistencies between the two versions. The process of forward‐back translation was repeated until all ambiguities disappeared …”

PERSPECTIVES INTERNATIONALES : Les besoins en soins de soutien comme prédicteurs de la qualité de vie de patientes atteintes d’un cancer gynécologique

“…Cet outil, largement reconnu pour sa grande fiabilité et validité, a été traduit dans plusieurs langues dont le bahasa indonesia. (Ayana, Negash, Yusuf, Tigeneh et Haile, 2016;Azmawati, Najibah, Hatta et Norfazilah, 2014;McCarthy, 2011;Michels, Latorre et Maciel, 2013;Nejjari et al, 2014). Une précédente étude réalisée en Indonésie a obtenu un score de validité de 0,14-0,48 pour cet outil, jugé valide et fiable (Perwitasari et al, 2011).…”

Cross-Cultural Adaptation, Translation, and Moroccan Validation of CareGiver Oncology Quality of Life (CarGoQoL) questionnaire

“…In Morocco; no studies have been conducted on the measurement of health-related quality of life among caregivers of palliative cancer patients. [12] The availability of a valid and reliable Moroccan version of quality of life measurement instruments is essential to collect such measures. There are several advantages to culturally adapting an existing instrument rather than composing a new one [13] Most adaptation processes involve two main steps: the assessment of equivalence between the source and adapted instrument and the assessment of the measurement properties of the adapted instrument [12].…”

“…[12] The availability of a valid and reliable Moroccan version of quality of life measurement instruments is essential to collect such measures. There are several advantages to culturally adapting an existing instrument rather than composing a new one [13] Most adaptation processes involve two main steps: the assessment of equivalence between the source and adapted instrument and the assessment of the measurement properties of the adapted instrument [12]. The intercultural adaptation of a quality of life instrument is a step-by-step process [13][14][15][16].…”