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 Lecukocyte
count(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).