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Efficacy (HAMD score) after drug switch in 60 patients with brand response.
| Course of treatment | Before switch | After switch | P-value |
|---|---|---|---|
| 1–3 years (n = 30) | 17.67 ± 4.093 | 11.08 ± 5.030 | 0.000 |
| 4–10 years (n = 22) | 15.69 ± 3.478 | 10.75 ± 5.447 | 0.013 |
| >10 years (n = 8) | 15.50 ± 1.000 | 11.00 ± 4.889 | 0.135 |
| Total | 16.75 ± 3.780 | 10.95 ± 5.058 | 0.000 |
