Table 1. Baseline characteristics of the CPPE/Empyema and PPE groups.
| CPPE/Empyema (n = 36) | PPE (n = 47) | p value | ||
|---|---|---|---|---|
| Age | 71.6±10.6 | 68.0±12.3 | N.S. | |
| M:F | 30:6 | 40:7 | N.S. | |
| Underlying disease - | 4 (11.1%) | 8 (17.0%) | N.S. | |
| Underlying disease + | 32 (88.9%) | 39 (83.0%) | N.S. | |
| NIDDM type2 | 11 (30.6%) | 14 (29.8%) | N.S | |
| Lung disease | 10 (27.8%) | 14 (29.8%) | N.S | |
| COPD | 2 | 6 | N.S | |
| Old TB | 2 | 3 | N.S | |
| Asthma | 1 | 2 | N.S | |
| Bronchiectasis | 1 | 0 | N.S | |
| Others | 4 | 3 | N.S | |
| Cardiac disease | 15 (41.7%) | 14 (29.8%) | N.S | |
| Renal disease | 3 (8.3%) | 6 (12.8%) | N.S | |
| Malignancy | 9 (25.0%) | 6 (12.8%) | N.S | |
| CVD | 8 (22.2%) | 4 (8.5%) | N.S | |
| CTD | 3 (8.3%) | 0 (0%) | N.S | |
| Symptom - | 3 (8.3%) | 4 (8.5%) | N.S. | |
| Symptom + | 33 (91.7%) | 43 (91.5%) | N.S. | |
| Pyrexia | 21 (58.3%) | 31 (70.5%) | N.S | |
| BT (°C) | 37.5±1.1 | 37.5±1.0 | N.S. | |
| Chest pain | 15 (41.7%) | 24 (51.0%) | N.S. | |
| Productive cough | 14 (38.9%) | 15 (31.9%) | N.S. | |
| Dyspnea | 9 (25.0%) | 8 (17.0%) | N.S. | |
| Smoking | 22 (61.1%) | 27 (57.4%) | N.S. | |
| Pack/years | 29.1±31.1 | 34.2±28.2 | N.S | |
| Alcohol drinking | 18 (50.0%) | 17 (36.2%) | N.S. | |
| The time from initial onset | 13.0±15.3 | 8.6±8.4 | N.S. |
The data of the CPPE/empyema and PPE group are compared using Pearson’s χ2 test or the Mann-Whitney test. Data are presented as means±SD.
BT: body temperature, CPPE: complicated parapneumonic effusion, CTD: connective tissue disease, CVD: cerebral vascular disease, NIDDM: non-insulin-dependent diabetes mellitus, N.S: not significant, PPE: parapneumonic effusion