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Table 5 Outcomes of patients with Chronic Obstructive Pulmonary Disease (COPD), according to the number of COPD-related emergency department visits in one year

From: Frequent utilization of the emergency department for acute exacerbation of chronic obstructive pulmonary disease

Variables 1 ED visit 2 ED visits ≥ 3 ED visits P value
Number of ED visits for COPD, no. 69,398 34,010 51,328
30-day ED revisit rate for COPD, % (95% CI)* 10.5 (10.1-10.8) 30.0 (29.6-30.4) <0.001
Hospitalization rate for COPD, % (95% CI) 62.3 (62.0-62.7) 64.9 (64.4-65.4) 62.1 (61.6-62.5) <0.001
Near-fatal event rate, % (95% CI) 5.8 (5.6-6.0) 8.2 (7.9-8.5) 8.8 (8.6-9.1) <0.001
  1. Abbreviations: COPD chronic obstructive pulmonary disease ED emergency department, IQR interquartile range, CI confidence interval.
  2. *Excluding the index ED visits and hospitalizations.