Figure 3From: Frequent utilization of the emergency department for acute exacerbation of chronic obstructive pulmonary diseaseMedian and cumulative charges for emergency department (ED) and inpatient services for acute exacerbation of chronic obstructive pulmonary disease (AECOPD), according to ED visit frequency. There was a significant linear association between frequency of ED visits and charges per patient (P < 0.001).Back to article page