Clinical characteristics of subjects with chronic obstructive pulmonary disease(COPD) versus non-COPD
| Group | Age yrs | Sex | BMI | Cause of death | Corticosteroids mg·day−1 | Mechanical ventilation h | Additional respiratory diagnoses | FEV1 L % predicted |
| Non-COPD# | 62 | M | 27.3 | Cardiac arrest | N | <24 | N | NA |
| 78 | M | 27.4 | Myocardial infarction | N | N | N | NA | |
| 73 | M | 27.0 | Myocardial infarction | N | N | N | NA | |
| 52 | F | 15.8 | Sepsis | N | <24 | N | NA | |
| 70 | M | 22.1 | Cardiac arrest | N | N | N | NA | |
| 60 | F | 25.2 | Cancer breast and liver | N | N | N | NA | |
| COPD¶ | 69 | M | Myocardial infarction | N | 24 | Pneumonia | 1.44, 61 | |
| 78 | M | 30.3 | Respiratory failure | 10 | <1 | Pneumonia | 1.23, 55 | |
| 75 | M | 25.1 | Respiratory failure | N | 48 | Pneumonia | 1.45, 43 | |
| 55 | F | 27.3 | Respiratory failure | 7.5 | 35 days | Pneumonia | 0.80, 33 | |
| 70 | M | 19.6 | Respiratory failure | N | N | Pulmonary fibrosis | 1.91, 52 | |
| 64 | F | 20.0 | Pneumonia/sepsis | N | N | Pneumonia | NA |
BMI: body mass index; FEV1: forced expiratory volume in one second; M: male; F: female: N; none: NA: not available. #: mean±se age: 65.8±9.6; BMI: 24.1±4.6. ¶: mean±se age: 68.5±8.2; BMI: 24.5±4.6.