Table 4.
The ten most frequent principal diagnoses of 30-day readmissions in patient hospitalized for acute exacerbation of chronic obstructive pulmonary disease, stratified by acute kidney injury
| Without AKI (n = 50,984) | With AKI (n = 8151) | ||
|---|---|---|---|
| Primary diagnosisa | n (%) | Primary diagnosisa | n (%) |
| COPD and bronchiectasis | 12,954 (25.4) | Septicemia | 1176 (14.4) |
| Pneumonia | 3947 (7.7) | Acute renal failure | 963 (11.8) |
| Respiratory failure | 3571 (7.0) | COPD and bronchiectasis | 944 (11.6) |
| Asthma | 3255 (6.4) | Congestive heart failure | 713 (8.8) |
| Congestive heart failure | 3.019 (5.9) | Respiratory failure | 623 (7.6) |
| Septicemia | 1806 (3.5) | Pneumonia | 579 (7.1) |
| Cardiac dysrhythmia | 1395 (2.7) | Asthma | 204 (2.5) |
| Nonspecific chest pain | 921 (1.8) | Acute myocardial infarction | 166 (2.0) |
| Aspiration pneumonitis | 683 (1.3) | Nonspecific chest pain | 166 (2.0) |
| Fluid and electrolyte disorders | 666 (1.3) | Intestinal infection | 158 (1.9) |
aThe primary diagnosis codes (> 14,000 ICD-9-CM diagnosis codes) are consolidated into 285 mutually exclusive diagnostic categories by using the AHRQ-defined Clinical Classifications Software