Table 1. Ultrasonic features of IMLN.
| Variable | Metastatic group (n=224) | Non-metastatic group (n=54) | χ2 (t) | P |
|---|---|---|---|---|
| Long diameter | 11.9±4.0 | 7.6±2.2 | −10.503 | 0.000 |
| Short diameter | 5.8±1.9 | 3.8±1.1 | −10.063 | 0.000 |
| L/S ratio | 2.09±0.47 | 2.06±0.49 | −0.294 | 0.769 |
| Structure type | 41.620 | 0.000 | ||
| I | 3 (18.7) | 13 (81.3) | ||
| II | 4 (44.4) | 5 (55.6) | ||
| III | 32 (94.1) | 2 (5.9) | ||
| IV | 185 (84.5) | 34 (15.5) | ||
| Blood flow | 7.120 | 0.068 | ||
| No blood flow | 149 (80.1) | 37 (19.9) | ||
| Punctiform blood flow | 17 (70.8) | 7 (29.2) | ||
| Strip blood flow | 52 (89.7) | 6 (10.3) | ||
| Rich blood flow | 6 (60.0) | 4 (40.0) | ||
| Multiplicity | 21.447a | 0.000 | ||
| Single | 113 (71.1) | 46 (28.9) | ||
| Multiplicity | 111 (93.3) | 8 (6.7) | ||
| Intercostal distribution | 9.207a | 0.002 | ||
| Single | 153 (75.5) | 48 (24.5) | ||
| Multiplicity | 71 (90.3) | 6 (9.7) | ||
| Intercostal space | 2.851 | 0.583 | ||
| Multiplicity | 67 (91.8) | 6 (8.2) | ||
| 1st | 58 (79.5) | 15 (20.5) | ||
| 2nd | 73 (73.0) | 27 (27.0) | ||
| 3rd | 19 (79.2) | 5 (20.8) | ||
| 4th | 6 (85.7) | 1 (14.3) | ||
| 5th | 1 (100.0) | 0 (0) |
L/S ratio = long axis length/short axis length ratio. Data are presented as mean ± SD and number (percent). a, 0 cells (0.0%) have expected count less than 5.