Table 1. Description of patient characteristics in two groups.
| Characteristics | Group C (N=38, 37.3%) | Group H (N=64, 62.7%) | P value |
|---|---|---|---|
| Age, mean ± SD (years) | 49.6±11.6 | 53.2±10.8 | 0.11 |
| Male, N (%) | 23 (60.5) | 48 (75.0) | 0.12 |
| Weight, mean ± SD (kg) | 63.1±12.4 | 68.1±14.6 | 0.08 |
| Education, mean ± SD (year) | 9.0±3.4 | 9.9±3.1 | 0.20 |
| Diabetes mellitus, N (%) | 6 (15.8) | 12 (18.8) | 0.71 |
| Chronic heart disease, N (%) | 12 (31.6) | 15 (23.4) | 0.37 |
| Hypertension, N (%) | 19 (50.0) | 30 (46.9) | 0.76 |
| COPD, N (%) | 2 (5.3) | 4 (6.3) | 1.00 |
| Atelectasis, N (%) | 11 (28.9) | 14 (21.9) | 0.42 |
| Lobectomy, N (%) | 13 (34.2) | 15 (23.4) | 0.24 |
Group H, Group Hypercapnia; Group C, Group Control; SD, standard deviation; COPD, chronic obstructive pulmonary disease.