Table 3

Algorithm performances in detection of referable pterygium

Testing setsDetection of referable pterygium*
AUC % (95% CI)Sensitivity % (95% CI)Specificity % (95% CI)Accuracy % (95% CI)MCC
Internal:
 SEED98.5 (96.6 to 99.6)94.0 (85.7 to 100.0)95.3 (93.3 to 96.8)95.2 (93.3 to 96.8)0.745
External:
 Set 199.7 (99.3 to 100.0)87.2 (63.6 to 100.0)99.3 (98.9 to 99.6)99.3 (98.9 to 99.6)0.660
 Set 299.0 (97.4 to 99.8)94.3 (84.2 to 100.0)98.0 (97.5 to 98.4)98.0 (97.5 to 98.4)0.536
  • *Referable pterygium defined as presence of pterygium with >2.50 mm encroachment onto the cornea (measured from the limbus) or base width (at limbus) of >5.00 mm.

  • AUC, Area under receiver operating characteristic curve; MCC, Mathew’s correlation coefficient; SEED, Singapore Epidemiology of Eye Diseases.