TABLE 2:
Comparison of Ultrasound LI-RADS Visualization Scores for Study Variables
| Variable, Level | No. of Examinations | Score A | Score B | Score C | p |
|---|---|---|---|---|---|
| Total | 10,589 | 7574 (71.5) | 2566 (24.2) | 449 (4.2) | |
| Site | .03 | ||||
| 1 | 7813 | 5533 (70.8) | 1942 (24.9) | 338 (4.3) | |
| 2 | 2776 | 2041 (73.5) | 624 (22.5) | 111 (4.0) | |
| Patient location | 10,511 | < .001 | |||
| ED | 699 | 348 (49.8) | 280 (40.1) | 71 (10.2) | |
| Inpatient | 2029 | 1193 (58.8) | 688 (33.9) | 148 (7.3) | |
| Outpatient | 7783 | 5971 (76.7) | 1583 (20.3) | 229 (2.9) | |
| Sonographer | |||||
| Volume (examinations) | 10,440 | < .001 | |||
| < 50 | 1023 | 597 (58.4) | 345 (33.7) | 81 (7.9) | |
| 50–500 | 7564 | 5548 (73.3) | 1745 (23.1) | 271 (3.6) | |
| > 500 | 1853 | 1350 (72.9) | 417 (22.5) | 86 (4.6) | |
| Experience (y) | 10,358 | .05 | |||
| 0–3 | 1184 | 852 (72.0) | 293 (24.7) | 39 (3.3) | |
| 4–10 | 3656 | 2572 (70.4) | 910 (24.9) | 174 (4.8) | |
| > 10 | 5518 | 4006 (72.6) | 1290 (23.4) | 222 (4.0) | |
| Reader | |||||
| Practice pattern | 10,586 | < .001 | |||
| Ultrasound | 4110 | 3060 (74.5) | 875 (21.3) | 175 (4.3) | |
| Abdominal | 4345 | 2913 (67.0) | 1223 (28.1) | 209 (4.8) | |
| Community | 2077 | 1562 (75.2) | 454 (21.9) | 61 (2.9) | |
| Interventional | 54 | 37 (68.5) | 13 (24.1) | 4 (7.4) | |
| Volume (examinations) | 10,586 | < .001 | |||
| < 50 | 197 | 124 (62.9) | 59 (29.9) | 14 (7.1) | |
| 50–500 | 6137 | 4587 (74.7) | 1314 (21.4) | 236 (3.8) | |
| > 500 | 4252 | 2861 (67.3) | 1192 (28.0) | 199 (4.7) | |
| Experience (y) | 10,586 | .04 | |||
| 0–3 | 141 | 104 (73.8) | 27 (19.1) | 10 (7.1) | |
| 4–10 | 1804 | 1249 (69.2) | 477 (26.4) | 78 (4.3) | |
| > 10 | 8641 | 6219 (72.0) | 2061 (23.9) | 361 (4.2) | |
| Median (95% CI) examination room time (min) | 8588 | 31.0 (15.0–77.0) | 33.0 (16.0–83.0) | 36.0 (16.0–79.0) | < .001a |
Note—Unless otherwise indicated, values are expressed as number of examinations, with percentages in parentheses. Percentages represent distributions of visualization scores for each level of each variable (i.e., across rows). Counts do not sum to 10,589 for individual variables because of missing data. p values were calculated using a chi-square test unless otherwise indicated. ED = emergency department.
a
Computed using Wilcoxon rank-sum test.