1. Volume 143, Issue 1, Pages 82-90 (January 2013)
Association Between Antibiotic Treatment and Outcomes in Patients Hospitalized With Acute Exacerbation of COPD Treated With Systemic Steroids 
Mihaela S. Stefan, MD, Michael B. Rothberg, MD, MPH, Meng-Shiou Shieh, PhD, Penelope S. Pekow, PhD, Peter K. Lindenauer, MD 
CHEST 
Volume 143, Issue 1, Pages (January 2013)
DOI: /chest
Copyright © 2013 The American College of Chest Physicians Terms and Conditions

2. Figure 1
Patient selection flow diagram. AE-COPD = acute exacerbation of COPD.
CHEST  , 82-90DOI: ( /chest )
Copyright © 2013 The American College of Chest Physicians Terms and Conditions

3. Figure 2
Outcomes of early antibiotic treatment vs late or not-treated in patients hospitalized for acute exacerbation of COPD.
CHEST  , 82-90DOI: ( /chest )
Copyright © 2013 The American College of Chest Physicians Terms and Conditions

4. Figure 3
Sensitivity analysis to estimate the potential impact of unmeasured confounding.
CHEST  , 82-90DOI: ( /chest )
Copyright © 2013 The American College of Chest Physicians Terms and Conditions