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Second-eye cataract surgery in elderly women: a cost-utility analysis conducted alongside a randomized controlled
T H Sach1, A J E Foss, R M Gregson
1School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich, UK. T.Sach@uea.ac.uk
Aim:
The aim of this study was to evaluate the cost-effectiveness of second-eye cataract surgery for older women with minimal visual dysfunction in the eye to be operated on from a Health and Personal Social Services perspective, compared to waiting list controls who had already undergone first-eye cataract surgery.
Methods:
A cost-utility analysis was undertaken alongside a randomized controlled trial of second-eye cataract surgery in secondary care ophthalmology clinics. A total of 239 women over 70 years old with one unoperated cataract were randomized to cataract surgery (expedited, approximately 4 weeks) or control (routine surgery, 12 months wait). Outcomes were measured in terms of quality-adjusted life years (QALYs), with health-related quality of life estimated using the EuroQol EQ-5D.
Results:
The operated group had costs which were, on average, pound646 more than the control group (95% confidence interval, pound16-1276, P<0.04) and had a mean QALY gain of 0.015 (95% confidence interval, -0.039 to 0.068, P=0.59) per patient over 1 year. Therefore, the incremental cost-utility ratio was pound44,263 over the 1-year trial period. In an analysis modelling costs and benefits over patients' expected lifetime, the incremental cost per QALY was pound17,299, under conservative assumptions.
Conclusions:
Second-eye cataract surgery is not likely to be cost-effective in the short term for those with mild visual dysfunction pre-operation. In the long term, second-eye cataract surgery appears to be cost-effective unless carer costs are included.
