Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,718 questions · 1,762 findings · 100 reviews · Headline outcomes only

No studies found 507 · 28.8%GRADE not reported 115 · 6.5%Very low 556 · 31.6%Low 444 · 25.2%Moderate 114 · 6.5%High 26 · 1.5%

Switching to mianserin (60 mg/d) vs continuing on current antidepressant (fluoxetine 20 mg/d)

Depressive symptoms · treatment‐resistant depression in adults

Switching to mianserin (60 mg/d) showed no clear difference in depressive symptoms (HAM‐D) Scale from: 0 to 54 (worse) compared with continuing on current antidepressant (fluoxetine 20 mg/d) (low certainty).

1 finding from 1 review

Augmentation of current antidepressant (SSRI/SNRI) with mirtazapine (30 mg/d) vs augmentation of current antidepressant (various) with placebo

Leaving the study early · treatment‐resistant depression in adults

Augmentation of current antidepressant (SSRI/SNRI) with mirtazapine… showed no clear difference in dropouts compared with augmentation of current antidepressant (SSRI/SNRI) therapy with… (high certainty).

1 finding from 1 review

Augmentation of current antidepressant (SSRI/SNRI) with mirtazapine (30 mg/d) vs augmentation of current antidepressant (various) with placebo

Response (≥ 50% improvement in BDI‐II score) · treatment‐resistant depression in adults

Augmentation of current antidepressant (SSRI/SNRI) with mirtazapine… showed no clear difference in response (≥ 50% improvement in BDI‐II score) compared with augmentation of current antidepressant (SSRI/SNRI) therapy with… (high certainty).

1 finding from 1 review

Augmentation of current antidepressant (SSRI/SNRI) with mirtazapine (30 mg/d) vs augmentation of current antidepressant (various) with placebo

Remission · treatment‐resistant depression in adults

Augmentation of current antidepressant (SSRI/SNRI) with mirtazapine… showed no clear difference in remission (BDI‐II total score ≤ 9) compared with augmentation of current antidepressant (SSRI/SNRI) therapy with… (high certainty).

1 finding from 1 review

Augmentation of current antidepressant (SSRI) with busiprone (20 mg/d to 60 mg/d) vs placebo plus antidepressant

Leaving the study early · treatment‐resistant depression in adults

Augmentation of current antidepressant (SSRI) with busiprone (20… showed no clear difference in dropouts compared with augmentation of current antidepressant (SSRI) with placebo (low certainty).

1 finding from 1 review