Table 2.

Breast cancer detectability

Variables [n (%)]	Age	Ultrasonography	Mammography	Magnification mammography	Age + magnification mammography
Cut-off point	59.0	3.5	1.5	3.5	0.5
Youden's index	0.61	0.56	0.33	0.67	1.00
Sensitivity (%)	66.7	66.7	33.3	66.7	100.0
Specificity (%)	94.4	88.9	100.0	100.0	100.0
AUC (95% CI)	0.648 (0.127–1.000)	0.787 (0.534–1.000)	0.667 (0.272–1.000)	0.833 (0.499–1.000)	1.000 (1.000–1.000)
Standard error	0.266	0.129	0.201	0.171	0.000
p	0.421	0.119	0.366	0.070	0.007

AUC = Area Under Curve.