Table 2 Receiver operator characteristic curve analysis for the proposed diagnostic criteria: area under the curve, sensitivity and specificity for different combinations of scores

Characteristic	Area under the curve	Score	Sensitivity (%)	Specificity (%)	1−specificity
A sum	0.980	0.5	96	100	0.000
		1.5	24	100	0.000
		3.0	0	100	0.000
B sum	0.841	0.5	88	74.8	0.252
		1.5	28	98.2	0.018
		3	0	100	0.000
C sum	0.955	0.5	100	58.6	0.414
		1.5	84	95.5	0.045
		2.5	48	100	0.000
		4	0	100	0.000
Total score	0.997	0.5	100	39.6	0.604
		1.5	100	87.4	0.126
		2.5	96	100	0.000
		3.5	92	100	0.000
		4.5	56	100	0.000
		5.5	24	100	0.000
		7.0	0	100	0.000