Table 1 Accuracy increases with sample size
Accuracy measuresPractice 1 (N = 927)Practice 2 (N = 3699)Practice 3 (N = 7110)Practice 4 (N = 12057)Total (N = 23793)
Sensitivity100.0100.0100.0100.0100.0
Specificity98.099.899.899.899.7
Positive predictive value57.198.396.997.496.4
Negative predictive value98.2100.0100.0100.0100.0
Accuracy98.199.899.899.899.8