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• W2896661263 abstract "Abstract Purpose To explore the accuracy and cost‐effectiveness of three vision screening models among preschool children in rural China. Methods Vision screening was carried out among children aged 4–5 years in 65 preschools in two counties in Northwest China, using Crowded Single Lea Symbols to test visual acuity. Children were assigned randomly by school to one of three screening models: screening by teachers (15 schools, 1835 children), local optometrists (30 schools, 1718 children) or volunteers (20 schools, 2183 children). Children identifying ≥2 symbols incorrectly in either eye failed screening. Accuracy of screening was compared with screenings executed by experienced optometrists among 141 children selected randomly from the three screening models. Direct and indirect costs for each model were assessed. Costs to detect a true case failed screening were estimated. Results The sensitivity for three models ranged from 76.9% to 87.5%, specificity from 84.9% to 86.7% and standardized positive predictive value from 83.7% to 85.7%. None differed significantly between models. The costs per case detected were $37.53, $59.14 and $52.19 for the teachers, local optometrists and volunteers. In producing the cost estimates for teacher screening and local optometrist screening models, we used a salary payment that was identical for both models (with the salary being equal to that of the optometrist). The teacher screening model was the most cost‐effective. Conclusion Accuracy of screening by teachers, local optometrists and volunteers was the same in this setting, but the use of teachers was most cost‐effective, reducing the cost per case detected by almost 40%." @default.
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• W2896661263 date "2018-10-21" @default.
• W2896661263 modified "2023-10-16" @default.
• W2896661263 title "The cost‐effectiveness of alternative vision screening models among preschool children in rural China" @default.
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• W2896661263 doi "https://doi.org/10.1111/aos.13954" @default.
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