Table 6.

Correlation of pathologic factors withquantitative shear wave elastographic parameters in large tumor (>20 mm)

Variable	n	Emax			Emean			Eratio			SD
Mean ± SD	β coefficient	p	Mean ± SD	β coefficient	p	Mean ± SD	β coefficient	p	Mean ± SD	β coefficient	p
Histologic grade
1	5	235.44 ± 44.18			171.36 ± 36.73			10.78 ± 6.73			34.24 ± 8.36
2	9	201.8 ± 88.92	–33.64 ± 36.05	0.361	150.72 ± 59.23	–20.64 ± 26.7	0.448	8.39 ± 6.54	–2.39 ± 6.85	0.730	38.64 ± 38.97	4.4 ± 14.38	0.762
3	10	233.42 ± 43.06	–2.02 ± 35.41	0.955	185.13 ± 40.34	13.77 ± 26.22	0.605	18.78 ± 17.15	8 ± 6.73	0.248	29.08 ± 13.07	–5.16 ± 14.12	0.719
Lymph node status
Negative	17	221.94 ± 63.67			173.15 ± 48.83			11.23 ± 9.01			27.09 ± 13.02
Positive	7	222.09 ± 69.25	0.14 ± 29.3	0.996	160.14 ± 49.59	-13.01 ± 22.02	0.561	18.05 ± 19.1	6.82 ± 5.65	0.241	49.9 ± 38.96	22.81 ± 10.41	0.039
LVI
Negative	20	217.53 ± 67.03			173.33 ± 51.78			12.26 ± 8.67			26.74 ± 16.96
Positive	4	244.25 ± 44.29	26.72 ± 35.27	0.457	149.5 ± 17.42	-23.83 ± 26.59	0.380	18.04 ± 26.95	5.78 ± 7.01	0.419	68.78 ± 31.85	42.04 ± 10.77	0.001
Pathologic type
IDC	21	230.07 ± 55	40.87 ± 56.29	0.476	174.43 ± 42.02	23.93 ± 43.01	0.584	14.2 ± 13.28	7.1 ± 13.59	0.607	34.66 ± 25.97	3.26 ± 26.58 13.1 ± 36.73 -25.4 ± 36.73	0.904
ILC	1	256.70	67.5 ± 77.78	0.396	208.20	57.7 ± 59.43	0.343	9.79	2.69 ± 18.78	0.888	44.50	13.1 ± 36.73	0.725
DCIS	1	50.30	–138.9 ± 77.78	0.089	42.80	–107.7 ± 59.43	0.085	2.13	–4.97 ± 18.78	0.794	6.00	–25.4 ± 36.73	0.497
Etc	1	189.20			150.50			31.0			31.40
ER
Negative	6	210.25 ± 22.01			166.35 ± 21.43			8.26 ± 4.74			24.55 ± 14.11
Positive	18	225.89 ± 72.8	15.64 ± 30.57	0.614	170.36 ± 54.97	4.01 ± 23.28	0.865	14.87 ± 14.16	6.61 ± 5.96	0.280	36.81 ± 27.36	12.26 ± 11.77	0.309
PR
Negative	6	219.08 ± 41.61			180.03 ± 41.42			8.94 ± 4.46			22.92 ± 10.97
Positive	18	222.95 ± 70.67	3.87 ± 30.74	0.901	165.8 ± 51.02	–14.23 ± 23.1	0.544	14.64 ± 14.29	5.7 ± 6.01	0.353	37.35 ± 27.5	14.43 ± 11.66	0.229
HER2
Negative	16	224.49 ± 64.9			165.4 ± 47.11			11.89 ± 13.55			34.01 ± 23.99
Positive	8	216.96 ± 65.62	–7.53 ± 28.2	0.792	177.28 ± 53.04	11.88 ± 21.25	0.582	15.88 ± 11.2	4 ± 5.56	0.480	33.2 ± 28.69	–0.81 ± 11.08	0.942
Ki67
<14 %	8	244.1 ± 70.81			168.74 ± 46.63			11.64 ± 7.1			42.29 ± 30.23
≥14 %	14	222.93 ± 43.66	–21.17 ± 24.25	0.393	179.27 ± 40.26	10.53 ± 18.88	0.583	15.38 ± 15.48	3.74 ± 5.84	0.529	31.63 ± 22.3	–10.66 ± 11.24	0.354