Table 3. The elastography features of differently calcified nodules in benign and malignant groups.
| Features | Benign group | P value @ | Malignant group | P value @ | ||||
|---|---|---|---|---|---|---|---|---|
| Non-calcification * (n=140) | Micro-calcification * (n=94) | Macro-calcification * (n=112) | Non-calcification * (n=37) | Micro-calcification * (n=65) | Macro-calcification * (n=69) | |||
| Conventional SE score | 0.110 | 0.242 | ||||||
| Score 1 | 1 (0.7) | 0 (0) | 0 (0) | 0 (0) | 0 (0) | 0 (0) | ||
| Score 2 | 40 (28.6) | 26 (27.7) | 37 (33.0) | 1 (2.7) | 5 (7.7) | 3 (4.3) | ||
| Score 3 | 88 (62.9) | 49 (52.1) | 64 (57.1) | 5 (13.5) | 15 (23.1) | 9 (13.0) | ||
| Score 4 | 9 (6.4) | 18 (19.1) | 9 (8.0) | 26 (70.3) | 30 (46.2) | 45 (65.2) | ||
| Score 5 | 2 (1.4) | 1 (1.1) | 2 (1.8) | 5 (13.5) | 15 (23.1) | 12 (17.4) | ||
| ARFI SE grade | 0.036 | 0.613 | ||||||
| Grade 1 | 1 (0.7) | 0 (0) | 0 (0) | 0 (0) | 1 (1.5) | 0 (0) | ||
| Grade 2 | 39 (27.9) | 19 (20.2) | 31 (27.7) | 2 (5.4) | 2 (3.1) | 3 (4.3) | ||
| Grade 3 | 86 (61.4) | 53 (56.4) | 74 (66.1) | 3 (8.1) | 10 (15.4) | 9 (13.0) | ||
| Grade 4 | 12 (8.6) | 15 (16.0) | 5 (4.5) | 22 (59.5) | 26 (40.0) | 36 (52.2) | ||
| Grade 5 | 2 (1.4) | 6 (6.4) | 2 (1.8) | 8 (21.6) | 24 (36.9) | 20 (29.0) | ||
| Grade 6 | 0 (0) | 1 (1.1) | 0 (0) | 2 (5.4) | 2 (3.1) | 1 (1.4) | ||
| Maximum SWS of nodule # (m/s) | 2.91 ± 1.74 [0.56-8.40] | 3.80 ± 2.39 [1.03-8.21] | 3.89± 2.31[0.54-8.40] | <0.001 | 4.81 ± 2.32 [1.50-8.00] | 5.86 ± 2.53 [1.17-8.40] | 6.27 ± 2.56 [1.40-8.40] | 0.018 |
| Mean SWS of nodule # (m/s) | 2.35 ± 1.31 [0.35-8.21] | 2.73 ± 1.47 [0.85-8.04] | 2.80 ± 1.57[0.41-8.11] | 0.029 | 3.56 ± 1.75 [1.40-8.12] | 4.05 ± 2.07 [1.05-8.12] | 5.11 ± 2.49 [1.12-8.32] | 0.001 |
*
Numbers in parentheses are percentages.
#
ata are means ± standard deviations. Ranges are in brackets.
@
P values of nonparametric variables were determined by Chi-square test, and P values of continuous variables by one way analysis of variation.
Abbreviations: SE, strain elastography; ARFI , acoustic radiation force impulse; SWS, shear-wave speed.