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Visual impairment and nursing home placement in older Australians: the Blue Mountains Eye Study
Jie Jin Wang1, Paul Mitchell, Robert G Cumming
1Department of Ophthalmology, Save Sight Institute, the University of Sydney, Westmead, NSW, Australia.
Purpose:
To assess whether visual impairment at baseline is an independent contributor to subsequent nursing home placement during a 6-year follow-up.
Methods:
3654 non-institutionalised people aged 49+ years (82.4% of those eligible) who participated in baseline examinations of the Blue Mountains Eye Study (1992-94) were followed during 1997-99. Presenting visual acuity was measured with current glasses and a standardised refraction performed. We defined visual impairment as visual acuity reduced to
Results:
At baseline, 511 participants had presenting visual impairment. After refraction, vision improved to 20/30 or better in 346 persons (68%, "correctable"), while 165 (32%) remained visually impaired. During follow-up, 162 study participants (5.0%) were admitted permanently to a nursing home. The age-adjusted 6-year incidence was 3.6% for participants with normal vision, 16.2% for those with visual impairment after best correction and 8.1% for those with "correctable" visual impairment. After adjusting for non-cognitive factors that predicted nursing home placement, the relative risk (RR) for nursing home admission among persons with visual impairment after best correction was 1.8 (95% CI 1.1-2.9). A similar magnitude of association was found among persons with "correctable" visual impairment (RR 2.1, 95% CI 1.4-3.1). For each line of reduction in presenting visual acuity at baseline, there was a 7% increased risk of subsequent nursing home placement.
Conclusions:
This study suggests that decreased vision may be a marker or contributing factor to subsequent nursing home placement in general older populations.