1. Economic Burden of COPD in the Presence of Comorbidities
David M. Mannino, MD, FCCP, Keiko Higuchi, MPH, Tzy-Chyi Yu, PhD, MHA, Huanxue Zhou, MS, Yangyang Li, MS, Haijun Tian, PhD, Kangho Suh, PharmD 
CHEST 
Volume 148, Issue 1, Pages (July 2015)
DOI: /chest
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2. Figure 1
Patient selection. ICS = inhaled corticosteroid; LABA = long-acting β2-adrenergic agonist; LAMA = long-acting muscarinic antagonist.
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Copyright © 2015 The American College of Chest Physicians Terms and Conditions

3. Figure 2
A, B, Resource use from index date through 360 d after the index date for each outcome. A, By comorbidity. B, By number of comorbidities. CKD = chronic kidney disease; CVD = cardiovascular disease; ER = emergency room.
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Copyright © 2015 The American College of Chest Physicians Terms and Conditions

4. Figure 3
Difference in average total health-care cost by comorbidity from index date through 360 d after the index date in 2012 US dollars. See Figure 2 legend for expansion of abbreviations.
CHEST  , DOI: ( /chest )
Copyright © 2015 The American College of Chest Physicians Terms and Conditions