Characteristics of study participants
| Characteristic | Metoprolol immediate release tablet | Metoprolol controlled release tablet |
| Participants (n) | 7 | 5 |
| Age, mean±SD (year) | 37±8 | 37±5 |
| Extensive CYP2D6 metaboliser (n) | 2 | 1 |
| Intermediate CYP2D6 metaboliser (n) | 5 | 4 |
| BMI, mean±SD (kg/m²) | ||
| Before surgery | 39.9±2.1 | 38.6±4.0 |
| 5–6 months after surgery | 30.8±2.3 | 29.2±4.3 |
| −Δ | 9.1±1.2* | 9.4±0.7* |
*P<0.01.
BMI, body mass index.