| Data | Patients with HCM (n = 56) | Controls (n = 30) | p Value |
| Age (years) | 42 (27, 51) | 42 (30, 53) | 0.83 |
| Male gender (%) | 39 (70) | 24 (80) | 0.30 |
| History of hypertension (%) | 18 (32) | 8 (27) | 0.56 |
| Basal LVOT obstruction (gradient >30 mm Hg) | 21 (38) | 0 (0) | |
| β-Blocker and/or calcium blocker use (%) | 40 (71) | 17 (57) | 0.22 |
| MRI maximal end-diastolic septal thickness (cm) | 2.3 (1.9, 2.6) | 1.2 (1,1.3) | <0.001 |
| MRI maximal end-diastolic PM thickness (cm) | 1.4 (1.2, 1.6) | 1.2 (1, 1.4) | <0.001 |
| Minimum distance between anterolateral PM and septum (cm) | 0.6 (0.38, 0.69) | 1.1 (0.9, 1.4) | <0.001 |
| Prevalence of apically displaced PM (%) | 39 (70) | 5 (17) | <0.001 |
| Prevalence of double bifid PM (%) | 43 (77) | 5 (17) | <0.001 |
Results are shown as No (%) or mean (interquartile range).
HCM, hypertrophic cardiomyopathy; LVOT, left ventricular outflow tract; MRI, magnetic resonance imaging; PM, papillary muscle.