Table 2.

Algorithm performances in detection of any pterygium

Testing sets	Detection of any pterygium
	AUC % (95% CI)	Sensitivity % (95% CI)	Specificity % (95% CI)	Accuracy % (95% CI)	MCC
Internal:
SEED	99.5 (99.0 to 99.9)	98.6 (97.0 to 99.7)	99.0 (97.7 to 100.0)	98.8 (98.0 to 99.7)	0.976
External:
Set 1	99.1 (97.4 to 99.9)	95.9 (89.2 to 100.0)	98.5 (97.8 to 98.9)	98.4 (97.8 to 98.9)	0.782
Set 2	99.7 (99.4 to 99.8)	100.0 (100.0 to 100.0)	88.3 (87.2 to 89.4)	88.6 (87.5 to 89.7)	0.400

AUC, area under the curve; MCC, Matthew’s correlation coefficient; SEED, Singapore Epidemiology of Eye Diseases.