Clin Ophthalmol. 2012;6:1411-9. doi: 10.2147/OPTH.S33592. Epub 2012 Sep 03.
A comparison of the NEIVFQ25 and GQL-15 questionnaires in Nigerian glaucoma patients.
Clinical ophthalmology (Auckland, N.Z.)
Chigozie A Mbadugha, Adeola O Onakoya, Olufisayo T Aribaba, Folashade B Akinsola
Affiliations
Affiliations
- Guinness Eye Centre, Department of Ophthalmology, Lagos University, Teaching Hospital, Lagos State, Nigeria.
PMID: 22969288
PMCID: PMC3437959 DOI: 10.2147/OPTH.S33592
Abstract
AIM: To compare two vision-specific quality of life (QOL) instruments - the disease-specific 15-item Glaucoma Quality of Life questionnaire (GQL-15) and the nonglaucoma-specific 25-item National Eye Institute Visual Function Questionnaire (NEIVFQ25).
METHODS: The QOL of 132 glaucoma patients being managed in Lagos University Teaching Hospital and an equal number of controls matched for age and sex was assessed using two vision-specific instruments: GQL-15 and the NEIVFQ25. The categorization of the severity of glaucoma into mild, moderate, and severe disease was determined using the degree of visual field loss. The Statistical Package for the Social Sciences (version 15; SPSS Inc, Chicago, IL) software program was used for analyzing the data obtained. Spearman's correlation coefficients were used to assess the correlation between the scores from the two questionnaires.
RESULTS: Patients had the greatest difficulty with activities affected by glare and dark adaptation in the GQL-15. Driving and general vision were the factors most affected in the NEIVFQ25. The Spearman rho values showed strong correlations (rho > 0.55) between the NEIVFQ25 and GQL-15 QOL scores for the total number of participants (rho: -0.75), total number of cases (rho: -0.83), and the mild (rho: -0.76), moderate (rho: -0.75), and severe (rho: -0.84) cases. There was a moderate correlation (rho: -0.38) for QOL scores of controls. Cronbach's alpha was 0.94 for the GQL-15 and 0.93 for the NEIVFQ25, showing high internal consistency for both questionnaires.
CONCLUSION: The GQL-15 and the NEIVFQ25 questionnaires showed high internal consistency, correlated strongly with each other, and were reliable in the assessment of glaucoma patients in this study.
Keywords: GQL-15; NEIVFQ25; primary open-angle glaucoma; quality of life questionnaires
References
- Arch Ophthalmol. 1997 Jun;115(6):777-84 - PubMed
- J Glaucoma. 2003 Apr;12(2):139-50 - PubMed
- Niger Postgrad Med J. 2005 Sep;12(3):189-92 - PubMed
- Ophthalmology. 2001 May;108(5):887-97; discussion 898 - PubMed
- Arch Ophthalmol. 1993 Jun;111(6):831-6 - PubMed
- Arch Ophthalmol. 1998 Jul;116(7):861-6 - PubMed
- Eye (Lond). 2002 Jan;16(1):44-9 - PubMed
- Med Care. 1989 Mar;27(3 Suppl):S217-32 - PubMed
- Qual Life Res. 1993 Apr;2(2):153-9 - PubMed
- Med Care. 1992 Dec;30(12):1111-26 - PubMed
- Arch Ophthalmol. 1997 Nov;115(11):1447-55 - PubMed
- Korean J Ophthalmol. 2002 Dec;16(2):70-4 - PubMed
- Ophthalmology. 1998 Mar;105(3):561-6 - PubMed
- Surv Ophthalmol. 2001 May-Jun;45(6):531-48 - PubMed
- Am J Ophthalmol. 2006 Jan;141(1 Suppl):S3-14 - PubMed
- Qual Life Res. 2004 Aug;13(6):1163-75 - PubMed
- Arch Ophthalmol. 1994 May;112(5):630-8 - PubMed
- Acta Ophthalmol Scand. 2001 Apr;79(2):116-20 - PubMed
- Ophthalmology. 2008 Jun;115(6):941-948.e1 - PubMed
- Med Care. 1981 Aug;19(8):787-805 - PubMed
- Clin Ophthalmol. 2011;5:259-67 - PubMed
- J Glaucoma. 2009 Jan;18(1):6-12 - PubMed
- Arch Ophthalmol. 2001 Jul;119(7):1050-8 - PubMed
- Ophthalmic Epidemiol. 2006 Feb;13(1):67-80 - PubMed
- Ophthalmology. 1997 Feb;104(2):334-42 - PubMed
- BMC Ophthalmol. 2008 Jan 23;8:2 - PubMed
- J Ophthalmic Vis Res. 2010 Apr;5(2):87-91 - PubMed
- Arch Ophthalmol. 1998 Nov;116(11):1496-504 - PubMed
- J Glaucoma. 2008 Oct-Nov;17(7):546-51 - PubMed
- N Engl J Med. 1982 Mar 18;306(11):639-45 - PubMed
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