The effect of visual impairment on vision-related quality of life in American Indian/Alaska Natives.
OBJECTIVE
To determine if National Eye Institute Visual Function Questionnaire (NEI-VFQ-25) scores decrease with worsening visual acuity (VA) in American Indian/Alaska Natives (Al/AN), as well as determine the other associated explanatory factors for vision-related quality of life.


METHODS
The study included 414 randomly selected AI/AN tribal members aged 40 years or older from the Pacific Northwest. We excluded candidates who were deceased, seriously ill, had dementia, or otherwise were unable to perform subjective testing such as visual field testing. The participants completed the NEI-VFQ-25, as well as a detailed eye examination. We defined visual impairment as presenting distance VA 20/40 or worse in the better-seeing eye. The main outcome measures were NEI-VFQ-25 composite and subscale scores. We compared median NEI-VFQ-25 composite and subscale scores in those with visual impairment to those without visual impairment.


RESULTS
Visual impairment occurred in 53 (12.8%, Cl: 9.6-16.0) participants. The NEI-VFQ-25 median composite score was significantly lower in those with visual impairment as compared to those without visual impairment (77.5 vs. 90.1, p = .001). A univariate analysis showed VA to be significantly (p < .05) associated with all subscales except ocular pain. When controlling for age, gender, income level, education, percent AIAN heritage, and marital status, a multivariate proportional odds model analysis showed VA to be the best predictor of NEI-VFQ 25 composite scores.


CONCLUSIONS
Visual impairment is common in Northwest AI/AN. The NEI-VFQ-25 was sensitive to differences in VA, suggesting it is a valid measure of vision-related quality of life in AI/AN.
Legacy Health System, Devers Eye Institute/Discoveries In Sight, Portland, Oregon 97210, USA.
Tina M
TM
McClure
Dongseok
D
Choi
Thomas
T
Becker
George A
GA
Cioffi
Steven L
SL
Mansberger
D000203:Activities of Daily Living; D000328:Adult; D000368:Aged; D005260:Female; D006302:Health Services Research; D006801:Humans; D007198:Indians, North American / Q000706:statistics & numerical data*; D004930:Inuit / Q000706:statistics & numerical data*; D008297:Male; D008875:Middle Aged; D009316:National Institutes of Health (U.S.); D011788:Quality of Life; D018434:Sickness Impact Profile; D011795:Surveys and Questionnaires; D014481:United States / Q000453:epidemiology; D014786:Vision Disorders / Q000208:ethnology* / Q000503:physiopathology; D014792:Visual Acuity / Q000502:physiology; D019987:Persons with Visual Disabilities / Q000706:statistics & numerical data*