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. Author manuscript; available in PMC: 2015 Dec 1.
Published in final edited form as: J AAPOS. 2014 Dec;18(6):539–542. doi: 10.1016/j.jaapos.2014.07.176

Table 4.

Performance metrics for the Spot referral, version 2.0.16, by age group

ARF + ARF – Sensitivity (95% CI) Specificity (95% CI) PPV (95% CI) NPV (95% CI)
Patients 12-30 months
    Spot referral/positive 27 13 81.8 56.7 67.5 73.9
    Spot pass/negative 6 17 (68.1, 91.0) (40.6, 71.7) (53.5, 79.4) (56.3, 86.8)
Patients 31-48 months
    Spot referral/positive 23 10 82.1 76.2 69.7 86.5
    Spot pass/negative 5 32 (67.3, 91.7) (63.2, 86.1) (54.5, 82.0) (74.6, 93.8)
Patients >48 months
    Spot referral/positive 164 25 89.6 80.3 86.8 84.3
    Spot pass/negative 19 102 (84.9, 93.2) (73.2, 86.2) (81.7, 90.8) (77.5, 89.6)
P value, age group compare 0.136 0.011 0.001 0.360

ARF, amblyopia risk factors; CI, confidence interval; NPV, negative predictive value; PPV, positive predictive value.