Table 1. Sensitivity,specificity,accuracy for experienced and inexperienced observers.

		Sensitivity%(95%CI)	Specificity%(95%CI)	Accuracy%(95%CI)
The 1 set	experienced	90.3 (82.5∼98.0)	94.4 (89.5∼99.4)	92.4 (90.0∼94.8)
	in-experienced	69.0 (56.2∼81.9)	84.1 (74.8∼93.4)	76.6(70.9∼82.2)
	p	0.19	0.1	<0.01
The 2set	experienced	91.6 (78.7∼105.0)	90.6 (83.7∼97.5)	91.0 (86.0∼95.9)
	in-experienced	85.7 (78.3∼93.1)	88.7 (83.2∼94.2)	88.7 (83.9∼91.5)
	p	0.342	0.638	0.259
The 3 set	experienced	92.2 (82.8∼97.2)	97.5 (93.6∼101.4)	95.1 (92.2∼98.1)
	in-experienced	93.8 (89.1∼98.4)	98.6 (96.5∼100.7)	96.4 (94.4∼98.5)
	p	0.647	0.553	0.420
The 4 set	experienced	94.3 (88.6∼99.9)	96.4 (90.9∼102.0)	95.1 (92.2∼98.1)
	in-experienced	97.4 (94.9∼99.9)	93.9 (89.6∼98.1)	96.0 (94.1∼98.0)
	p	0.260	0.427	0.609
The total	experienced	92.1 (88.6∼95.6)	94.7 (92.3∼97.1)	93.4 (91.8∼95.0)
	in-experienced	86.5 (81.9∼91.1)	91.3 (88.3∼94.3)	89.2(86.4∼91.9)
	p	0.093	0.123	0.029