Table 2.
Comparison of variables between the two groups
| NUSG (n=51) | USG (n=52) | P-value | |
|---|---|---|---|
| ED length of stay (min) | 163.0 (133.0–193.0) | 89.0 (119.0–176.5) | < 0.001 |
| Symptom duration (min) | 180.0 (60.0–270.0) | 120.0 (60.0–247.5) | 0.325 |
| Total amount of radiation (mSv)a) | 5.2959 (4.7321–5.8938) | 5.0822 (4.7093–5.7078) | 0.392 |
| Proportion of patients who underwent additional contrast-enhanced CTa) | 6/46 (13.0) | 2/44 (4.5) | 0.267 |
| Grade of analgesic protocol | 0.341 | ||
| 0 | 0 (0) | 1 (1.9) | |
| 1 | 28 (54.9) | 15 (28.8) | |
| 2 | 5 (9.8) | 10 (19.2) | |
| 3 | 17 (33.3) | 21 (40.4) | |
| 4 | 1 (2.0) | 5 (9.6) | |
| Proportion of patients with diseases other than ureteral calculusa) | 6/46 (13.0) | 3/44 (6.8) | 0.486 |
| Grade of hydronephrosis on bedside ultrasonography | |||
| 1 | NA | 31 (59.6) | |
| 2 | NA | 17 (32.7) | |
| 3 | NA | 4 (7.7) | |
| Time spent performing bedside ultrasonography (min) | NA | 4.0 (3.2–5.0) | |
| Urinalysis turn-around time | 78.0 (58.0–108.0) | 76.0 (51.0–133.5) | 0.790 |
| Proportion of patients with unexpected ED revisits | 4 (7.8) | 5 (9.6) | 1.000 |
Values are presented as median (interquartile range) or number (%).
NUSG, non-ultrasonography group; USG, ultrasonography group; ED, emergency department; CT, computed tomography; NA, not applicable.
a)
Excluding patients who did not undergo CT (NUSG, 46; USG, 44).