Acoustic Radiation Force Impulse Technology in the Differential Diagnosis of Solid Breast Masses with Different Sizes: Which Features Are Most Efficient?

Table 4

Diagnostic performance of ARFI for breast masses from different size groups.

Group and feature	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)	Accuracy (%)	Az (95% CI)
Small ()
SWV ≥ 2.545	55.6; (25/45)	95.5; (63/66)	89.3; (25/28)	75.9; (63/83)	79.3; (88/111)	0.790; (0.743–0.837)
VTI pattern = 4	93.3; (42/45)	71.2; (47/66)	68.9; (42/61)	94.0; (47/50)	80.2; (89/111)	0.786; (0.739–0.833)
AR ≥ 1.155^a	93.3; (42/45)	90; (45/50)	89.4; (42/47)	93.8; (45/48)	91.6; (87/95)	0.942; (0.916–0.967)
Big ()
SWV ≥ 3.575	82.2; (60/73)	98.9; (86/87)	98.4; (60/61)	86.9; (86/99)	91.3; (146/160)	0.903; (0.874–0.931)
VTI pattern = 4	91.8; (67/73)	80.5; (70/87)	79.8; (67/84)	92.1; (70/76)	85.6; (137/160)	0.838; (0.802–0.875)
AR ≥ 1.035^b	89.0; (65/73)	79.7; (51/64)	83.3; (65/78)	86.4; (51/59)	84.7; (116/137)	0.886; (0.856–0.917)
Total ()
SWV ≥ 3.05	69.5; (82/118)	97.4; (149/153)	95.3; (82/86)	80.5; (149/185)	85.2; (231/271)	0.846; (0.820–0.873)
VTI pattern = 4	92.4; (109/118)	76.5; (117/153)	75.1; (109/145)	92.9; (117/126)	83.4; (226/271)	0.815; (0.786–0.844)
AR ≥ 1.14^c	85.6; (101/118)	87.7; (100/114)	87.8; (101/115)	85.5; (100/117)	86.6; (201/232)	0.909; (0.889–0.930)

Note: ^aARs were calculated for masses of Patterns 1, 3, and 4, ; ^bARs were calculated for masses of Patterns 1, 3, and 4, ; ^cARs were calculated for masses of Patterns 1, 3, and 4, .