Table 3.
Unadjusted Risk Ratios of Pitt Bacteremia Score Components on 14-Day Inpatient Mortality
| 14-Day Inpatient Mortality | |||
|---|---|---|---|
| Variable | Weight | Risk Ratio (95% Confidence Interval) | P Value |
| Hypotensiona,b | 2 | 5.9 (3.2, 10.9) | <.0001 |
| Mechanical ventilationb | 2 | 4.6 (2.7, 7.8) | <.0001 |
| Cardiac arrestc | 4 | 4.5 (3.2, 6.3) | <.0001 |
| Mental status (referent: normal)b | |||
| Disoriented | 1 | 0.49 (0.22, 1.1) | .08 |
| Stuporous | 2 | 1.4 (0.83, 2.5) | .2 |
| Comatose | 4 | 2.4 (1.5, 4.0) | .0005 |
| Maximum temperature (°C)b (referent: 36.1–38.9) | |||
| 35.1–36.0 or 39.0–39.9 | 1 | 1.7 (1.1, 2.6) | .03 |
| ≤35.0 or ≥40.0 | 2 | 2.6 (1.2, 5.6) | .01 |
| Pitt bacteremia score ≥4 (N = 475) | 12.2 (6.0, 24.6) | <.0001 | |
| Bacteremic infections (n = 124) | 6.0 (2.5, 14.4) | <.0001 | |
| Nonbacteremic infections (n = 351) | 21.9 (7.0, 68.8) | <.0001 | |
aAn acute hypotensive event with drop in systolic blood pressure >30 mm Hg and diastolic blood pressure >20 mm Hg or requirement for intravenous vasopressor agents or systolic blood pressure <90 mm Hg.
bOn day of collection of index culture.
cOn day of or within 48 hours preceding collection of index culture.