Table 3

Optic nerve threshold values which optimise sensitivities, specificities, and positive and negative predictive values (with 95% CIs)

ThresholdSensitivity (%)Specificity (%)Positive predictive value (%)Negative predictive value (%)
ValueLCIUCIValueLCIUCIValueLCIUCIValueLCIUCI
Cup:disc ratio0.581.561.293.780.056.394.384.669.293.176.1958.587.9
Cup diameter (°)2.874.153.788.970.045.788.176.962.287.166.749.980.1
Cup depth (from rim edges)60081.561.993.785.062.196.888.071.895.577.360.188.5
Rim width (°)2.888.970.897.780.056.394.385.771.293.684.264.294.1
Rim area (µm)40088.970.897.775.050.991.382.869.091.283.362.693.7
  • LCI, lower CI;UCI, upper CI.