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Assessing the test–retest repeatability of the V ietnamese version of the N ational E ye I nstitute 25‐item V isual F unction Q uestionnaire among bilateral cataract patients for a V ietnamese population
Author(s) -
To Kien Gia,
Meuleners Lynn,
Chen HueiYang,
Lee Andy,
Van Do Dung,
Van Duong Dat,
Phi Tien Duy,
Tran Hoang Huy,
Nguyen Nguyen Do
Publication year - 2014
Publication title -
australasian journal on ageing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.63
H-Index - 34
eISSN - 1741-6612
pISSN - 1440-6381
DOI - 10.1111/ajag.12129
Subject(s) - intraclass correlation , vietnamese , cronbach's alpha , repeatability , test (biology) , medicine , reliability (semiconductor) , internal consistency , audiology , quality of life (healthcare) , psychology , gerontology , physical therapy , clinical psychology , psychometrics , statistics , nursing , mathematics , paleontology , power (physics) , physics , quantum mechanics , philosophy , linguistics , biology
Aim To determine the test–retest repeatability of the National Eye Institute 25‐item Visual Function Questionnaire ( NEI VFQ ‐25) for use with older V ietnamese adults with bilateral cataract. Methods The questionnaire was translated into V ietnamese and back‐translated into E nglish by two independent translators. Patients with bilateral cataract aged 50 and older completed the questionnaire on two separate occasions, one to two weeks after first administration of the questionnaire. Test–retest repeatability was assessed using the C ronbach's α and intraclass correlation coefficients. Results The average age of participants was 67 ± 8 years and most participants were female (73%). Internal consistency was acceptable with the α coefficient above 0.7 for all subscales and intraclass correlation coefficients were 0.6 or greater in all subscales. Conclusion The V ietnamese NEI VFQ ‐25 is reliable for use in studies assessing vision‐related quality of life in older adults with bilateral cataract in V ietnam. We propose some modifications to the NEI ‐ VFQ questions to reflect activities of older people in Vietnam.