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Frequency of depression in the case and control groups based on BDI‐II
| Group | Without depression, F (%) | Mild, F (%) | Moderate, F (%) | Severe, F (%) | Total, F (%) | P value |
|---|---|---|---|---|---|---|
| Case | 73 (52) | 34 (24) | 28 (20) | 6 (4) | 141 (100) | .001 |
| Control | 258 (84) | 27 (8) | 22 (7) | 3 (1) | 310 (100) | |
| Total | 331 (74) | 61 (13) | 50 (11) | 9 (1) | 451 (100) |
