Table 1.
Baseline characteristics of patients in the atrial fibrillation (AF) and sinus rhythm (SR) groups
| Variables | SR group (n = 36) | AF group (n = 28) | χ2/t | P |
|---|---|---|---|---|
| Demographics | ||||
| Age (year) | 67.8 ± 8.8 | 66.5 ± 8.1 | 0.605 | 0.547 |
| Gender (percent male) | 20 (55.6%) | 16 (57.1%) | 0.016 | 0.899 |
| BMI (kg/m2) | 23.8 ± 2.9 | 25.6 ± 3.6 | 1.652 | 0.104 |
| Smoking | 10 (27.8%) | 8 (28.6%) | 0.005 | 0.944 |
| NYHA functional class | 2.709 | 0.439 | ||
| I | 5 (13.9%) | 3 (10.7%) | ||
| II | 12 (33.3%) | 12 (42.9%) | ||
| III | 16 (44.4%) | 8 (28.6%) | ||
| IV | 3 (8.3%) | 5 (17.9%) | ||
| Echocardiography | ||||
| LVEF (%) | 58.8 ± 4.4 | 59.3 ± 5.0 | 0.391 | 0.697 |
| LAD (mm) | 37.9 ± 5.8 | 43.8 ± 3.9 | 4.547 | < 0.001 |
| Comorbidities | ||||
| Hypertension | 10 (27.8%) | 6 (21.4%) | 0.339 | 0.561 |
| T2DM | 12 (33.3%) | 8 (28.6%) | 0.166 | 0.683 |
| Stroke | 2 (5.6%) | 4 (14.3%) | 1.413 | 0.235 |
| COPD | 4 (11.1%) | 4 (14.3%) | 0.145 | 0.703 |
| Serum YKL-40 (μg/l) | 87.0 ± 36.6 | 101.5 ± 41.5 | 1.475 | 0.145 |
BMI body mass index, LVEF left ventricular ejection fraction, LAD left atrial diameter, T2DM type 2 diabetes mellitus, COPD chronic obstructive pulmonary disease, NYHA New York Heart Association