TABLE 2

Adjusted Mixed-Effects Logistic Regression: Association of Utilization With Hospitalization and ED Revisit

TestHospitalizationED Revisit Within 3 Days: All ED RevisitsED Revisit Within 3 Days: Revisit Requiring Hospitalization
ORa95% CIPORa95% CIPORa95% CIP
CBC10.410–10.8<.0011.971.82–2.12<.0011.391.2–1.6<.001
Blood cultures5.75.4–5.9<.0011.711.59–1.83<.0011.291.1–1.5.002
Chemistries10.39.9–10.8<.0011.781.59–1.94<.0011.371.12–1.68.002
Coagulation studies21.111.2–39.8<.0011.950.96–3.94.061.130.34–3.7.8
Viral studies5.65.3–5.8<.0011.341.21–1.49<.0010.980.79–1.22.8
Inflammatory markers7.36.9–7.7<.0012.21.94–2.49<.0011.721.3–2.27<.001
Chest radiograph10.96–1.04.91.070.99–1.16.071.030.88–1.22.7
Chest ultrasound99.551.1–193.9<.0012.750.44–17.3.30.540.02–13.7
Chest CT scan25.412.9–49.8<.0012.380.9–6.33.080.490.07–3.3.47
  • CI, confidence interval.

  • a Odds ratio (OR) represents the odds of hospitalization or ED revisit across hospitals given receipt of each diagnostic test.