Table 1. Patient and Visit Characteristics for the Entire Study Cohort.
| Characteristic | Finding (66 218 Visits and 55 314 Patients)a |
|---|---|
| Age, y | |
| Mean (SD) | 42.6 (12.4) |
| Median (IQR) | 43 (32-53) |
| Sex | |
| Female | 33 590 (50.7) |
| Male | 32 628 (49.3) |
| Insurance | |
| Medicaid only | 25 411 (38.4) |
| Private or combination | 40 807 (61.6) |
| Prescriptions filled within 7 d | |
| Medical expulsive therapy | 11 458 (17.3) |
| Antiemetic | 10 024 (15.1) |
| Oral opiates | 15 222 (23.0) |
| NSAIDs | 7477 (11.3) |
| ED imaging | |
| CT | 50 803 (76.7) |
| Ultrasonography | 5510 (8.3) |
| Comorbidity | |
| Any | 25 119 (37.9) |
| Diabetes | 8568 (12.9) |
| Renal disease | 1904 (2.9) |
| County-level datab | |
| Nonwhite race by county | |
| Population, % | 16.7 |
| Median (IQR) | 14.1 (13.0-19.7) |
| Latino ethnicity | |
| Population, % | 11.4 |
| Median (IQR) | 7.8 (7.2-19.2) |
| Median household income, $ | |
| Mean (SD) | 70 386 (14 134) |
| Median (IQR) | 65 735 (59 839-90 025) |
| Urologists per 100 000 population | |
| Mean (SD) | 4.2 (2.9) |
| Median (IQR) | 3.4 (3.0-5.6) |
| Outcomes | |
| Immediate admissions | 5851 (8.8) |
| Immediate admission and procedure | 1774 (2.7) |
| Subsequent ED visit in 7 d | 3608 (5.5) |
| ED visit in 60 d | 7654 (11.6) |
Abbreviations: CT, computed tomography; ED, emergency department; IQR, interquartile range; NSAIDs, nonsteroidal anti-inflammatory drugs.
a
Data are presented as number (percentage) of visits or patients unless otherwise indicated.
b
Race and ethnicity data were not available in the primary data set. Patient zip code was linked to county-level data from Area Resource Files. These data represent a county-level proportions, weighted by patients per county.