Table 2. General characteristics of cases and controls.
| Characteristics, m: mean, SD: standard deviation | Cases (n = 27) | Controls (n = 54) | p-value |
| Age, years, m (SD) | 60.9 (11.5) | 63.8 (11.6) | 0.29 |
| Female gender, n (%) | 24 (88.9) | 48 (88.9) | 1.00 |
| Body mass index, kg/m2, m (SD) | 30.8 (8.1) | 25.2 (7.1) | 0.002 |
| Diabetes, n (%) | 10 (37.0) | 4 (7.4) | 0.002 |
| Mitral valvular surgery, n (%) | 14 (51.9) | 26 (49.1) | 0.81 |
| Deceased, n (%) | 6 (22.2) | 9 (16.7) | 0.54 |
| Interview of both patient (or relative) and GP | 23 (85) | 46 (85) | 1.00 |
| Dexfenfluramine use | 9 (33.3) | 2 (3.7) | 0.001 |
| Benfluorex use | 19 (70.4) | 3 (5.6) | <0.001 |
| Odds-ratio (95% CI): 40.4 (9.7 to 168.3) | |||