Further validation of the Daily Living Tasks Dependent on Vision: identification of domains.

Further validation of the Daily Living Tasks Dependent on Vision: identification of domains. Research Abstract Details 

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Further validation of the Daily Living Tasks Dependent on Vision: identification of domains. Abstract Text:

AIM: To examine the Daily Living Tasks Dependent on Vision (DLTV), a visual function questionnaire for domain structure, and redundancy. METHOD: 235 subjects underwent full ophthalmic assessment and completed the DLTV questionnaire by interview. Principal component analysis with varimax rotation and item response theory (IRT) were used to assign the items to domains. The internal consistency of each domain was examined using Cronbach's alpha. Redundancy was assessed by regressing each item in a domain against the remainder of items in that domain. RESULTS: Four domains were identified. Domain 1 was formed by nine items, which after applying IRT were seen to be among the most difficult questions in the instrument. Domain 2 contained eight items, all of which fell in the easier half of the instrument on applying IRT. Domain 3 contained only three items, all of which were among the easier questions and appear to deal with peripheral vision function. Domain 4 consisted of two items dealing with adaptation to light and dark conditions. Cronbach's alpha for each domain was 0.96, 0.93, 0.73, 0.66. Redundancy was found to be present in domain 1, which was therefore reduced by two items, with little effect on internal consistency. CONCLUSIONS: The authors believe using the domains identified in this report will optimise the information provided by patients on their ability to function on visually demanding tasks.

Further validation of the Daily Living Tasks Dependent on Vision: identification of domains. Publishing Authors By Initials

For similar persons: disabled persons: visually impaired persons research abstracts see: persons: disabled persons: visually impaired persons research

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Further validation of the Daily Living Tasks Dependent on Vision: identification of domains. Journal Published:

PUBLICATION TYPE: Validation Studies

Journal: The British journal of ophthalmology

VOLUME: 89

Page Numbers: 1127-30

Journal Abbreviation: Br J Ophthalmol

ISSN: 0007-1161

DAY: 28

MONTH: Sep

YEAR: 2005

Further validation of the Daily Living Tasks Dependent on Vision: identification of domains. Information

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LANGUAGE: eng

NlmUniqueID: 421041

Further validation of the Daily Living Tasks Dependent on Vision: identification of domains. Keywords Mesh Terms:

KEYWORDS: Visually Impaired Persons

MESH TERMS: psychology

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Grant and Affiliation Information for Further validation of the Daily Living Tasks Dependent on Vision: identification of domains.

AFFILIATION: Department of Ophthalmology and Vision Science, The Queen's University of Belfast and Royal Group of Hospitals, Grosvenor Road, Belfast BT12 6BA, UK. pat.hart@royalhospitals.n-i.nhs.uk

Country: England

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MEDLINETA: Br J Ophthalmol

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