Table 1 The characteristics of COPD patients with different severity
Groups | Cases | Male/female | Age (years) | Duration of COPD(years) | Smoking history (packyears) | Number of current smoker | PaO2 (mmHg) | PaCO2(mmHg) | FEV1(L) | FVC (%) | FEV1/FVC (%) | ph |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Mild group | 41 | 36/5 | 69.3 ± 3.94 | 3.5 ± 1.24 | 38.4 ± 5.18 | 35 | 73.8 ± 7.42 | 48.4 ± 3.17 | 1.23 ± 0.19 | 88.66 ± 8.03 | 51.03 ± 7.47 | 7.4 ± 0.38 |
Moderate group | 45 | 38/7 | 68.9 ± 4.02 | 5.7 ± 1.93 | 45.2 ± 7.36 | 38 | 56.2 ± 6.46 | 60.2 ± 4.05 | 0.91 ± 0.18 | 79.58 ± 7.12 | 38.12 ± 9.12 | 7.3 ± 0.51 |
Severe group | 42 | 34/8 | 69.4 ± 3.97 | 7.1 ± 2.16 | 37.7 ± 6.05 | 35 | 49.4 ± 5.03 | 76.5 ± 5.22 | 0.59 ± 0.12 | 63.94 ± 6.44 | 29.14 ± 8.05 | 7.2 ± 0.59 |
p | Â | 0.120 | 0.097 | 0.008 | 0.034 | 0.097 | 0.029 | 0.009 | 0.005 | 0.002 | 0.010 | 0.047 |