Table 3.

Ranked 30-day readmissions diagnoses by patient age and clinical classification software categories among those hospitalized with an acute exacerbation of chronic obstructive pulmonary disease

Rank	30-Day Readmissions after COPD Exacerbation Hospitalization		30-d Readmissions after COPD Exacerbation Hospitalization (40–64 Yr)		30-Day Readmissions after COPD Exacerbation Hospitalization (≥65 Yr)
	Diagnosis by CCS	Percentage of Readmissions	Diagnosis by CCS	Percentage of Readmissions	Diagnosis by CCS	Percentage of Readmissions
1	COPD and bronchiectasis	28.36	COPD and bronchiectasis	31.01	COPD and bronchiectasis	26.72
2	Respiratory failure	9.47	Respiratory failure	11.03	Pneumonia	8.59
3	Pneumonia	7.64	Asthma	10.94	Respiratory failure	8.57
4	Asthma	6.97	Pneumonia	6.11	Congestive heart failure	6.81
5	Congestive heart failure	5.80	Septicemia	4.34	Septicemia	6.58
6	Septicemia	5.72	Congestive heart failure	4.16	Asthma	4.45
7	Cardiac dysrhythmias	2.44	Cardiac dysrhythmias	1.58	Cardiac dysrhythmias	2.97
8	Acute and unspecified renal failure	1.52	Nonspecific chest pain	1.49	Acute and unspecified renal failure	1.85
9	Acute myocardial infarction	1.12	Mood disorders	1.30	Aspiration pneumonitis	1.45
10	Fluid and electrolyte disorders	1.10	Skin and subcutaneous tissue infections	1.27	Gastrointestinal hemorrhage	1.40

Definition of abbreviations: CCS = Clinical Classification Software; COPD = chronic obstructive pulmonary disease.