Table 2. Laboratory findings between AECOPD with and without CAP.
| - | COPD without CAP Group (N=100) | COPD with CAP Group (N=90) | Independent t Test | |||
| Mean | SD | Mean | SD | p value | ||
| Arterial Blood Gas | PH | 7.03 | 0.17 | 7.09 | 0.29 | 0.070 |
| PCO2(mmHg) | 48.11 | 9.97 | 47.02 | 8.66 | 0.432 | |
| PO2(mmHg) | 58.66 | 10.67 | 58.07 | 7.41 | 0.667 | |
| SO2 (%) | 92.44 | 6.24 | 92.35 | 4.53 | 0.911 | |
| Laboratory Investigation | BUN(mg/dL) | 30.51 | 2.14 | 31.10 | 5.40 | 0.314 |
| Creatinne(mg/dL) | 1.18 | 0.37 | 1.36 | 0.86 | 0.058 | |
| Albumin(g/dl) | 3.42 | 0.57 | 3.30 | 0.70 | 0.210 | |
| Total Lecukocytecount(x12/L) | 10.00 | 4.31 | 13.25 | 6.34 | <0.001** | |
| Hemoglobin(g/dl) | 13.38 | 2.02 | 12.65 | 2.17 | 0.018* | |
| Platelet(x12/L) | 252.67 | 86.69 | 271.82 | 114.07 | 0.194 | |
| CRP(mg/L) | 9.68 | 1.65 | 13.64 | 2.54 | 0.001* | |
| Sodium(mmole/L) | 137.61 | 2.86 | 137.03 | 4.20 | 0.263 | |
| Potassium (mmole/L) | 3.96 | 0.53 | 3.85 | 0.56 | 0.166 | |
AECOPD: acute exacerbations of chronic obstructive pulmonary disease; BUN: blood urea nitrogen; CAP: community-acquired pneumonia; CRP: C-reactive protein; n: number; PaCO2: arterial carbon dioxide partial pressure; PaO2: arterial oxygen partial pressure; SD: standard deviation; SO2: oxygen saturation; *: p < 0.05: Significant (S); **: p < 0.01: Highly significant (HS).