Paediatric vision screening by non-healthcare volunteers: evidence based practices

BMC Medical Education

Table 3 Accuracy of Trainee Screeners^a

^aBased on failure criteria of best corrected distance VA < 20/30 if the child was > 5 years old, best corrected distance VA of < 20/40 if the child was < 5 years old, or > 2 lines difference between eyes
Prevalence: 6.6% (4.9–8.8%)
Accuracy: 75% (71–78%)
Sensitivity: 0.80 (0.66–0.90)
Specificity: 0.75 (0.71–0.78)
Likelihood Ratio of a positive test: (sensitivity/[1-specificity]) = 3.24 (2.66–3.94)
Likelihood Ratio of a negative test: ([1-sensitivity]/specificity) = 0.26 (0.14–0.47)

ISSN: 1472-6920