Table 1.

Reported dry eye (DE) symptoms and clinical findings

		Clinical findings
		DE	Control	Total
Symptoms	DE	1052	658	1710
	Control	302	250	552
	Total	1354	908	2262

The discrepant group contained 960 (302+658, 42.44%) subjects, which is significant in statistics (Pearson chi-square test: χ²=4.027, p=0.045<0.05). The sensitivity and specificity of DE identification based on subject symptoms were 77.70% (1052/1354) and 27.53% (250/908), respectively, and the accuracy of using the subjects’ perceived symptoms for DE identification was 57.56% ((1052+250)/2262). The positive predictive value was 61.52% (1052/1710), and the negative predictive value was 45.29% (250/552).