The McGill Quality of Life Questionnaire-Revised (MQOL-R). Psychometric properties and validation of a Brazilian version on palliative care patients: a cross-sectional study.

ABSTRACT: BACKGROUND:To assess the psychometric properties, including internal consistency, construct validity, criterion validity, criterion-group validity, and responsiveness, the Reviewed McGill Quality of Life Questionnaire (MQOL-R), into Brazilian Portuguese-(BrP). Also, to analyze the relationship of the BrP-MQOL-R with the scores on the Karnofsky Performance Scale (KPS) and on the Numerical Pain Scale (NPS 0-10). METHODS:The BrP-MQOL-R was administered to a sample of 146 adults (men?=?78). A team of experts translated the MQOL-R according to international guidelines. Convergent validity and Confirmatory factor analysis (CFA) was performed. RESULTS:The BrP-MQOL-R Cronbach's alpha was 0.85. CFA supported the original four-factor structure, with the following revised model fit-indices: PCLOSE?=?0.131, Tucker-Lewis Index (TLI) rho 2?=?0.918, incremental fit index (IFI) delta 2?=?0.936. The convergence validity is supported by a significant correlation between BrP-MQOL-R total scores and their subscales with KPS and with the single item related to the quality of life. And by a converse correlation with the pain scores in the NPS (0-10). Receiver operator characteristics (ROC) analysis showed subjects with KPS equal to or lower than 30% could be discriminated from those with scores on KPS higher than 30% by an area under the curve (AUC)?=?0.71, sensitivity?=?97%, and specificity?=?92%). CONCLUSION:The BrP-MQOL-R proves to be a reliable instrument for assessing the quality of life (QOL) in palliative care (PC), with primary evidence of validity. BrP-MQOL-R presented adequate discriminate properties to identify distinct conditions that impact the QOL in PC.

SUBMITTER: Serrano PV 

PROVIDER: S-EPMC7666518 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature