Validation and Use of Quality of Life Impact of Refractive Correction Questionnaire in Spectacle Wearers in Malawi: A clinic-based study

Dinesh Kaphle, Himal Kandel, Jyoti Khadka, Khathutshelo Percy Mashige, Joseph Matiya Msosa, Kovin Shunmugam Naidoo

Research output: Contribution to journalArticle

Abstract

Background To assess the psychometric properties of the QIRC questionnaire and use it as an outcome measure in spectacle wearers attending an eye clinic in Malawi. Methods Participants who had uncorrected distance visual acuity of below 6/18 and improved to 6/9 or better with spectacles on both eyes were included in the study. The participants self-administered the Chichewa version of the QIRC questionnaire that was translated and culturally adapted for Malawian settings. Psychometric evaluation of the QIRC responses was carried out using the WinSteps software (Version 3.92.1; Winsteps, Chicago, IL) by applying the Andrich rating scale model of the Rasch analysis. Results One hundred and forty-three participants (mean age ± standard deviation, 27.64 ± 2.91; age range; 16 to 39 years; male, 51.7%) completed the QIRC. The Chichewa QIRC had satisfactory psychometric properties (Ordered response categories, Person separation index, 1.93; Item separation index, 3.42; Targeting 0.70) including excellent Rasch-model fit statistics (Infit and Outfit MnSq < 1.30 for all items). The QIRC score was not significantly associated with sex, age, magnitude of refractive error, occupation and status of previous spectacle wear (p> 0.05 for all). The QIRC scores negatively correlated with uncorrected visual acuity (in logMAR) in the better eye (spearman’s rho=-0.34, p < 0.001). Conclusions The translated and culturally adapted version of the QIRC Questionnaire had satisfactory psychometric properties to measure the refractive error-specific quality of life in Malawi. It performed well as an outcome measure of spectacle wear.

Original languageEnglish
Pages (from-to)54-63
Number of pages10
JournalMalawi Medical Journal
Volume32
Issue number2
DOIs
Publication statusPublished - Jun 2020
Externally publishedYes

Bibliographical note

This work is licensed under the Creative Commons Attribution 4.0 International License.This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Keywords

  • Malawi
  • Quality of life
  • Rasch analysis
  • Spectacles
  • Validation

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