Table 2.
Baseline characteristics in all subjects at high altitude (2260 m).
| AF (n=147) | Control (n=95) | χ 2/T | P | |
|---|---|---|---|---|
| Male (n %) | 85.00 (57.80) | 46.00 (48.40) | 2.055 | 0.152 |
| Age (years) | 68.16 ± 9.58 | 69.28 ± 8.99 | 1.359 | 0.363 |
| Body mass index (kg/m2) | 25.55 ± 3.43 | 25.97 ± 2.64 | 4.467 | 0.290 |
| Smoking (n %) | 25.00 (17.00) | 11.00 (11.60) | 1.343 | 0.247 |
| Diabetes mellitus (n %) | 30.00 (20.40) | 14.00 (14.70) | 1.248 | 0.264 |
| Hypertension (n %) | 104.00 (70.70) | 64.00 (67.40) | 0.311 | 0.577 |
| Previous stroke (n %) | 32.00 (21.80) | 15.00 (15.80) | 1.318 | 0.251 |
| WBC (×109/L) | 5.63 ± 1.56 | 5.72 ± 1.63 | 0.004 | 0.668 |
| RBC (×1012/L) | 4.91 ± 0.68 | 4.92 ± 0.57 | 2.798 | 0.824 |
| Hb (g/L) | 152.66 ± 19.07 | 150.98 ± 17.28 | 1.245 | 0.488 |
| RDW (% CV) | 13.83 ± 1.12 | 13.10 ± 0.85 | 5.765 | 0.001 |
| HCT (%) | 46.26 ± 5.64 | 45.82 ± 5.01 | 1.726 | 0.538 |
| MCV (fL) | 94.56 ± 4.93 | 92.52 ± 9.75 | 0.110 | 0.032 |
| MCHC (g/L) | 330.24 ± 9.84 | 330.21 ± 9.44 | 0.038 | 0.983 |
| Plt (×109/L) | 154.60 ± 52.49 | 180.98 ± 47.62 | 0.342 | 0.001 |
| MPV (fL) | 12.16 ± 1.52 | 11.96 ± 1.26 | 0.041 | 0.302 |
| Cr (μmol/L) | 80.15 ± 20.68 | 63.47 ± 14.12 | 10.889 | 0.001 |
| UA (mmol/L) | 374.16 ± 114.71 | 331.38 ± 83.48 | 7.007 | 0.001 |
| TBIL (μmol/L) | 18.00 ± 8.00 | 16.93 ± 8.09 | 0.115 | 0.316 |
| LAD (mm) | 41.58 ± 6.56 | 34.21 ± 4.14 | 15.665 | 0.001 |
| LVEDD (mm) | 46.23 ± 4.73 | 46.01 ± 3.78 | 4.54 | 0.689 |
| IVST (mm) | 10.44 ± 1.49 | 9.88 ± 1.30 | 3.288 | 0.004 |
| LVPWT (mm) | 10.18 ± 1.30 | 9.66 ± 1.17 | 0.306 | 0.002 |
| LVEF (%) | 64.70 ± 6.89 | 64.57 ± 5.70 | 3.524 | 0.876 |
| Aspirin (n %) | 107.00 (72.80) | 59.00 (62.10) | 3.058 | 0.080 |
| ACEIs or ARBs (n %) | 40.00 (27.20) | 16.00 (16.80) | 3.488 | 0.062 |
| β-blocker (n %) | 55.00 (37.40) | 25.00 (26.30) | 3.212 | 0.073 |
| CCBs (n %) | 49.00 (33.30) | 30.00 (31.60) | 0.081 | 0.776 |
| Statins (n %) | 65.00 (44.20) | 39.00 (41.10) | 0.236 | 0.627 |
AF, atrial fibrillation; BMI, body mass index; WBC, white blood cell; RBC, red blood cell; Hb, hemoglobin; RDW, red cell distribution width; HCT, hematocrit; MCV, mean corpuscular volume; MCHC, mean corpuscular hemoglobin concentration; Plt, platelet count; MPV, mean platelet volume; Cr, creatinine; UA, uric acid; TBIL, total bilirubin; LAD, left atrial diameter; LVEDD, left ventricular end-diastolic diameter; IVST, interventricular septal thickness; LVPWT, left ventricular posterior wall thickness; LVEF, left ventricular ejection fraction.