Table 1

 Sample estimates of discriminatory power and predictive values for SAP and FDT to detect individuals classified as having glaucomatous optic neuropathy in either eye

SAP (HFA 24-2 Sita-Fast)FDT (Matrix 24-2)
Sensitivity, % (95% CI)80 (44 to 100)100 (72 to 100)
Specificity, % (95% CI)52 (38 to 66)26 (14 to 38)
Positive predictive value (95% CI)0.26 (0.14 to 0.38)0.31 (0.18 to 0.44)
Negative predictive value (95% CI)0.93 (0.86 to 1.00)1.00 (0.72 to 1.00)