Table 1.
Comparison of patient demographics and lesion characteristics for all enrolled patients by group
| Characteristics | EUS group | No-EUS group |
P value |
|---|---|---|---|
| Patient | N=348 | N=370 | |
| Median age, yrs (IQR) | 7.0 (1.8–14.1) | 5.8 (2.1–12.8) | 0.60 |
| Race/ethnicity | 0.64 | ||
| African American, non-Hispanic | 225 (65) | 248 (67) | |
| White, non-Hispanic | 91 (26) | 96 (26) | |
| Hispanic | 14(4) | 9 (2) | |
| Female | 201 (58) | 182 (49) | 0.02 |
| SSTI exposure history* | 144 (41) | 145 (39) | 0.5 |
| Lesion | N=387 | N=442 | |
| Location | 0.96 | ||
| Leg | 122 (32) | 150 (34) | |
| Buttock | 96 (25) | 105 (24) | |
| Arm | 26 (7) | 34 (8) | |
| Abdomen | 24 (6) | 33 (7) | |
| Pus noted prior to ED visit | 193 (50) | 220 (50) | 0.88 |
| Median area, cm2 (IQR) | |||
| Erythema | 9 (1–30) | 6 (1–20) | 0.14 |
| Induration | 6 (1–16) | 4 (1–12) | 0.001 |
| Fluctuance | 0 (0– 2) | 0 (0– 1) | 0.52 |
| Lesions not drained in ED | 156 (40) | 174 (39) | 0.78 |
| Lesion outcome determined by medical record review | 78 (50) | 89 (51) | |
| Lesion outcome determined by phone follow-up | 78 (50) | 85 (49) | |
| Lesion outcome determined by PCP questionnaire | 0 (0) | 0 (0) | |
| Prevalence of abscess requiring drainage (per reference standard of either ED drainage or follow-up) | 239 (62) | 266 (60) | 0.64 |
*
Exposure history defined as personal or close contact with history of SSTI within last year Data are reported as n (%) unless otherwise noted.
SSTI = skin and soft tissue infection; PCP = primary care physician