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Title: Utility of EQ-5D to assess patients undergoing cataract surgery
Authors: Ang, M.
Fenwick, E.
Wong, T.Y. 
Lamoureux, E.
Luo, N. 
Keywords: cataract
cataract surgery
Issue Date: Aug-2013
Citation: Ang, M.,Fenwick, E.,Wong, T.Y.,Lamoureux, E.,Luo, N. (2013-08). Utility of EQ-5D to assess patients undergoing cataract surgery. Optometry and Vision Science 90 (8) : 861-866. ScholarBank@NUS Repository.
Abstract: PURPOSE: To assess the construct validity and responsiveness of the EuroQoL-5D (EQ-5D) instrument in Asian patients undergoing cataract surgery in Singapore. METHODS: In this prospective study, English- or Chinese-speaking patients (n = 216) completed the EQ-5D and the VF-14 questionnaires before and 3 months after they underwent cataract surgery. The impact of cataracts on patients was assessed using two standard gamble (SG) questions before surgery. Construct validity of the EQ-5D index and the visual analog scale (VAS) was assessed by examining their correlation with the VF-14 and SG scores. Responsiveness of the EQ-5D was compared with that of the VF-14 in terms of the magnitude of score change associated with cataract surgery. RESULTS: We found that the EQ-5D index correlated with VF-14, SG (death), and SG (blindness) (Pearson r = 0.30, 0.23 and 0.24, respectively; p < 0.01). In contrast, we found no correlation between the EQ-VAS, VF-14, and SG scores. The mean EQ-5D index (difference, 0.06; effect size, 0.35) and VF-14 score (difference, 1.75; effect size, 0.97) of patients improved after cataract surgery (p < 0.0001). CONCLUSIONS: Our study demonstrated that the EQ-5D utility index is a valid and responsive outcome measure for evaluating the impact of cataract surgery in our Asian population. However, the implications of using the generic EQ-5D instrument to assess the cost-effectiveness of surgical interventions for visual impairment require further investigation. © 2013 American Academy of Optometry.
Source Title: Optometry and Vision Science
ISSN: 10405488
DOI: 10.1097/OPX.0000000000000004
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