Table 1  Comparison of baseline characteristics.
Arrhythmia (n = 34)  No Arrhythmia (n = 132)  p Value *
Female  11 (32.4)  47 (35.6)  0.817
Age (years), mean ± SD  73.6 ± 12.8  61.6 ± 16.7  <0.001 †
Hypertension  26 (76.5)  57 (43.2)  0.001
Cardiovascular disease  14 (41.2)  16 (12.1)  <0.001
Cardiomyopathy  1 (2.9)  4 (3.0)  1.000
LVEF (%), mean ± SD  57.1 ± 8.2 (n = 16)  45.7 ± 14.9 (n = 28)  0.002 †
Diabetes  7 (20.6)  22 (16.7)  0.566
Obesity  7 (23.3) (n = 30)  29 (26.9) (n = 108)  0.789
Body mass index (kg/m2) median (P25; P75)  24.1 (20.9; 25.1) (n = 17)  23.3 (20.6; 25.7) (n = 80)  0.939 ‡
Pulmonary disease  6 (17.6)  18 (13.6)  0.566
Immunodeficiency  4 (7.6)  10 (11.8)  0.441
QRS duration (ms), median (P25; P75)  95.5 (90.0; 107) (n = 24)  95.0 (90.0; 105) (n = 107)  0.797 ‡
QTc duration (ms), median (P25; P75)  430 (400; 470) (n = 24)  407 (393; 425) (n = 107)  0.012 ‡
Hydroxychloroquine  15 (44.1)  59 (44.6)  1.000
Hydroxychloroquine + azithromycin  7 (20.6)  20 (15.2)  0.424
Anticoagulation therapy  24 (80.0) (n = 30)  27 (23.3) (n = 116)  <0.001
- LMWH/UFH  15 (50.0)  17 (14.7)  <0.001
- Oral anticoagulants  9 (30.0)  10 (8.6)  0.005
Thromboprophylaxis with LMWH/UFH  5 (16.7) (n = 30)  52 (44.8) (n = 116)  0.004
LVEF = left ventricular ejection fraction. Data are presented as count and percentage within subgroup, unless stated otherwise. * = Fisher-Boschloo-test was used unless stated otherwise. † = t-test. ‡ = Wilcoxon-Mann-Whitney-test.