The Brazilian version of the 25-Item National Eye Institute Visual Function Questionnaire: translation, reliability and validity.
OBJECTIVE
To develop and investigate the reliability and validity of a Brazilian version of the 25-Item National Eye Institute Visual Function Questionnaire.


METHODS
A Brazilian version of the questionnaire was developed and applied to patients with chronic eye diseases and healthy controls. Reliability was assessed by Cronbach's alpha coefficient, intraclass correlation coefficient and interrater reliability coefficient. Participants were submitted to the Medical Outcomes Study Short Form-36 Questionnaire. Validity was estimated by the correlation between the questionnaires and among the 12 subscales of the questionnaire, subscales scores and visual acuity, patients' and controls' subscales scores, and the factor analysis. Responsiveness of the questionnaire was assessed in a group of patients before and following cataract surgery.


RESULTS
Cronbach's alpha, intraclass correlation and interrater reliability coefficients were highly significant. Validity was well established in all tests. In patients who underwent cataract surgery, a better vision-related quality of life was observed following surgery.


CONCLUSIONS
The Brazilian version of the 25-Item National Eye Institute Visual Function Questionnaire has valid and reliable psychometric properties and can be applied to vision-related quality of life research.
Simão
Luciano Mesquita
LM
Department of Neuro-Ophthalmology, Hospital São Geraldo, School of Medicine, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil. lucianosimao@gmail.com
Lana-Peixoto
Marco Aurélio
MA
Araújo
Carolina Reis
CR
Moreira
Marcos Aurélio
MA
Teixeira
Antônio Lúcio
AL
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000704:Analysis of Variance; D001938:Brazil; D016022:Case-Control Studies; D002387:Cataract Extraction / Q000523:psychology; D002908:Chronic Disease; D005128:Eye Diseases / Q000523:psychology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D054554:National Eye Institute (U.S.); D011594:Psychometrics; D011788:Quality of Life / Q000523:psychology*; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires / Q000592:standards*; D013997:Time Factors; D014177:Translations; D014481:United States; D014792:Visual Acuity / Q000502:physiology; D055815:Young Adult