Table 2. Demographic and physiological characteristics.
| Demographic Characteristic | Overall | Group 1 | Group 2 | |
|---|---|---|---|---|
| (n = 4,735) | (n = 6,855) | |||
| Age, mean (sd) | 57 (17) | 57 (16) | 58 (18) | |
| Sex, n (%) | ||||
| Female | 6,068 (52) | 2,202 (47) | 3,773 (55) | |
| Male | 5,522 (48) | 2,533 (53) | 3,062 (45) | |
| Race, n (%) | ||||
| White | 7,633 (66) | 2,917 (62) | 4,573 (67) | |
| Black | 2,570 (22) | 1,278 (27) | 1,367 (20) | |
| Asian | 166 (1) | 52 (1.1) | 109 (1.6) | |
| Othera | 1,223 (11) | 469 (9.9) | 787 (11.4) | |
| Ethnicity, n (%) | ||||
| Non-Hispanic | 10,640 (92) | 4,385 (93) | 6,281 (92) | |
| Hispanic | 918 (8) | 350 (7) | 574 (8) | |
| Physiological Characteristics | ||||
| Initial Temperature (°C) mean (sd) | 37.3 (1.20) | 37.3 (1.15) | 37.3 (1.22) | |
| Initial Hear Rate (/min) mean (sd) | 108 (19.7) | 108 (17.8) | 108 (20.4) | |
| Initial Respiratory Rate (/min) mean (sd) | 22 (6.7) | 22 (6.2) | 22 (7.0) | |
| Initial WBC counts (K/uL) median (IQR) | 14 (9.4, 19) | 13 (8.6, 17.9) | 14 (9.7, 19.7) | |
| Temperature ≥38°C or ≤36°Cb n (%) | 5,126 (44) | 1,772 (37) | 3,213 (47) | |
| Heart Rate ≥90/minb n (%) | 10,792 (93) | 4,403 (93) | 6,386 (93) | |
| Respiratory Rate ≥20/minb n (%) | 9,518 (82) | 3,731 (79) | 5,718 (83) | |
| WBC counts >12K/uL or <4K/uL n (%) | 9,623 (83) | 3,782 (80) | 5,776 (84) | |
| Logistic Organ Dysfunction Score | ||||
| LODS within first 3hr since triage mean (sd) | 1.9 (1.80) | 1.9 (1.59) | 2.5 (2.12) | |
| LODS prior to initial antibiotics mean (sd) | 2.5 (2.05) | 2.1 (1.62) | 2.6 (2.17) | |
aThe catch-all “Other” category includes: American Ind/Pac Islander/Two Races, Other and Unknown.
bAll the SIRS events are captured within first 48 hours during ED stay.