From: Impact of prior outpatient antibiotic use on mortality for community acquired pneumonia: a retrospective cohort study
Variable
Odds Ratio
95% Confidence Interval
PSI class
2.0
1.5–2.6
Initial antibiotics within 8 hours of admission
1.2
0.7–2.1
Use of guideline concordant antibiotics
0.8
0.4–1.4
Antibiotic use prior to admission
0.98
0.5–2.1