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Comparison of PHQ-9 scores in the two groups (mean ± SD)
| PHQ-9 score | Control group (n = 48) | MB group (n = 50) | p-value |
|---|---|---|---|
| Preoperative | 18.04 ± 3.09 | 18.92 ± 3.03 | 0.520 |
| 1 week postoperative | 11.71 ± 2.06a | 10.70 ± 2.58a | 0.351 |
| 1 month postoperative | 13.37 ± 2.50a | 6.63 ± 2.012a | < 0.01 |
| 3 months postoperative | 12.20 ± 4.21a | 5.64 ± 1.85a | < 0.01 |
| 6 months postoperative | 12.66 ± 3.57a | 4.05 ± 1.76a | < 0.01 |
ap < 0.05 versus the preoperative value within the same group
