Characteristics for patients with acute myocarditis versus age-matched and sex-matched population controls
| Variable | Patients with acute myocarditis | Population controls | P value |
| (n=2523) | (n=12 615) | ||
| Age, median (Q1–Q3) | 49 (30–69) | 48 (30–69) | 0.98 |
| Male sex, n (%) | 1709 (67.7) | 8545 (67.7) | >0.99 |
| Hypertension, n (%) | 804 (31.9) | 2019 (16.0) | <0.001 |
| Diabetes, n (%) | 194 (7.7) | 301 (2.4) | <0.001 |
| COPD, n (%) | 165 (6.5) | 223 (1.8) | <0.001 |
| Prior MI, n (%) | 184 (7.3) | 145 (1.1) | <0.001 |
| Prior IHD, n (%) | 396 (15.7) | 444 (3.5) | <0.001 |
| Prior PCI, n (%) | 58 (2.3) | 93 (0.7) | <0.001 |
| Prior CABG, n (%) | 23 (0.9) | 32 (0.3) | <0.001 |
| AF, n (%) | 373 (14.8) | 318 (2.5) | <0.001 |
| Stroke, n (%) | 114 (4.5) | 233 (1.8) | <0.001 |
| PAD, n (%) | 80 (3.2) | 123 (1.0) | <0.001 |
| Prior AV block, n (%) | 35 (1.4) | 37 (0.3) | <0.001 |
| Prior HF, n (%) | 324 (12.8) | 165 (1.3) | <0.001 |
| Prior VT/VF/arrest, n (%) | 45 (1.8) | 18 (0.1) | <0.001 |
| Prior ICD, n (%) | 40 (1.6) | 10 (0.1) | <0.001 |
| CKD, n (%) | 72 (2.9) | 86 (0.7) | <0.001 |
Q1–Q3: first–third quartile (25%–75%).
AF, atrial fibrillation or flutter; AV, atrioventricular; CABG, coronary artery bypass grafting; CKD, chronic kidney disease; COPD, chronic obstructive pulmonary disease; HF, heart failure; ICD, implantable cardioverter-defibrillator; IHD, ischaemic heart disease; MI, myocardial infarction; PAD, peripheral artery disease; PCI, percutaneous coronary intervention; ; VF, ventricular fibrillation; VT, ventricular tachycardia.