Table 3 Patient characteristics in three datasets.
Training dataset used to train models | Training dataset used to plot Qini curves | Test dataset | *P-value | |
|---|---|---|---|---|
N | 124 | 125 | 248 | |
Age | 66.50 [58.00, 72.00] | 66.00 [59.00, 73.00] | 67.00 [59.00, 72.00] | 0.886 |
Female sex | 33 (26.6) | 34 (27.2) | 54 (21.8) | 0.399 |
Body mass index | 23.98 [21.60, 26.82] | 24.73 [22.13, 26.71] | 24.34 [22.29, 26.46] | 0.462 |
Family history of atrial fibrillation | 13 (10.5) | 12 (9.6) | 13 (5.2) | 0.112 |
Long-standing persistent atrial fibrillation | 28 (22.6) | 28 (22.4) | 68 (27.4) | 0.468 |
Hypertension | 75 (60.5) | 71 (56.8) | 153 (61.7) | 0.661 |
Diabetes mellitus | 20 (16.1) | 21 (16.8) | 44 (17.7) | 0.951 |
Dyslipidemia | 60 (48.4) | 61 (48.8) | 106 (42.7) | 0.430 |
Smoking history | 83 (66.9) | 77 (61.6) | 142 (57.3) | 0.192 |
Heart failure | 24 (19.4) | 27 (21.6) | 41 (16.5) | 0.465 |
Dilated cardiomyopathy | 0 (0.0) | 2 (1.6) | 0 (0.0) | 0.125 |
Hypertrophic cardiomyopathy | 1 (0.8) | 1 (0.8) | 5 (2.0) | 0.689 |
Sick sinus syndrome | 2 (1.6) | 2 (1.6) | 3 (1.2) | 1.000 |
Stroke or systemic thromboembolism | 10 (8.1) | 13 (10.4) | 16 (6.5) | 0.408 |
Sleep apnea syndrome | 14 (11.3) | 15 (12.0) | 24 (9.7) | 0.755 |
Thyroid disease | 5 (4.0) | 8 (6.4) | 11 (4.4) | 0.658 |
Chronic obstructive pulmonary disease | 6 (4.8) | 5 (4.0) | 11 (4.4) | 0.960 |
Liver disease | 14 (11.3) | 5 (4.0) | 9 (3.6) | 0.014 |
History of use of anti-arrhythmic drug | 36 (29.0) | 26 (20.8) | 56 (22.6) | 0.269 |
Hemoglobin | 14.35 [13.47, 15.12] | 14.50 [13.70, 15.30] | 14.80 [13.80, 15.60] | 0.036 |
Brain type natriuretic peptide | 137.95 [87.65, 203.62] | 148.75 [100.05, 237.62] | 145.90 [99.25, 224.20] | 0.465 |
Creatinine | 0.86 [0.76, 1.00] | 0.88 [0.78, 0.98] | 0.88 [0.80, 1.01] | 0.359 |
C-reactive protein | 0.10 [0.06, 0.13] | 0.10 [0.07, 0.20] | 0.10 [0.06, 0.20] | 0.602 |
Left ventricular ejection fraction | 63.49 [59.34, 67.58] | 63.27 [56.00, 68.03] | 63.69 [57.64, 68.98] | 0.654 |
Left atrial diameter | 41.00 [38.00, 44.00] | 42.30 [39.95, 46.00] | 43.00 [39.00, 46.00] | 0.006 |
Mitral regurgitation | 0 (0.0) | 4 (3.2) | 6 (2.4) | 0.145 |
Recurrence of atrial fibrillation | 29 (23.4) | 31 (24.8) | 67 (27.0) | 0.746 |
