Table 1.
Demographic characteristics of the total and subgroup patients
|
Variable |
Total group |
Sub group |
P value |
|---|---|---|---|
| (n = 78) | (n = 39) | ||
| Age, years |
69.01 ± 10.39 |
67.90 ± 11.02 |
0.56a |
| Females, n (%) |
34(43.58) |
18(46.15) |
0.78b |
| BMI, kg/m2 |
21.82 ± 4.02 |
21.06 ± 3.87 |
0.89a |
| Smoking status, % |
|
|
|
| Current smoker |
35.14 |
40.93 |
0.66b |
| Ex-smoker |
35.12 |
33.26 |
|
| Never smoked |
29.74 |
25.81 |
|
| Smoking index, pack-years |
43.00 ± 26.00 |
41.00 ± 23.00 |
0.67a |
| Comorbidities, n (%) |
33(49.25) |
18(46.15) |
0.69b |
| Exacerbation frequency |
2.55 ± 1.44 |
2.58 ± 1.62 |
0.92a |
| Education, years |
6.79 ± 5.17 |
6.51 ± 4.89 |
0.63a |
| PaO2, mm Hg |
67.05 ± 18.90 |
67.80 ± 23.40 |
0.54a |
| PaCO2, mm Hg |
44.48 ± 11.85 |
43.42 ± 15.08 |
0.31a |
| Pulmonary function at exacerbation |
|
|
|
| FEV1, % predicted |
46.79 ± 19.14 |
45.37 ± 20.27 |
0.71a |
| FEV1, L |
0.90 ± 0.33 |
0.82 ± 0.38 |
0.39a |
| FVC, L | 1.57 ± 0.56 | 1.49 ± 0.57 | 0.44a |
Data are presented as mean ± standard deviation, except where indicated otherwise. Comorbidities included hypertension, diabetes mellitus, cerebral infarction, coronary artery disease, and these comorbidities were all in stable state which confirmed by physicians from related departments. BMI = Body Mass Index. at-test. bχ2 test.