Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

807 questions · 849 findings · 68 reviews · Headline outcomes only

No studies found 236 · 27.8%GRADE not reported 50 · 5.9%Very low 266 · 31.3%Low 168 · 19.8%Moderate 104 · 12.2%High 25 · 2.9%

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

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

Leaving the study early · treatment‐resistant depression in adults

Switching to mianserin (60 mg/d) showed no clear difference in dropouts compared with continuing on current antidepressant (fluoxetine 20 mg/d) (low certainty).

1 finding from 1 review

Augmentation of current antidepressant (various) with cariprazine (1 mg/d to 4.5 mg/d) vs augmentation of current antidepressant (various) with placebo

Dropouts ‐ Any dose · treatment‐resistant depression in adults

Augmentation of current antidepressant (various) with cariprazine (1… probably leads to higher dropouts ‐ any dose compared with augmentation of current antidepressant (various) with placebo (moderate certainty).

1 finding from 1 review

Augmentation of current antidepressant (various) with cariprazine (1 mg/d to 4.5 mg/d) vs augmentation of current antidepressant (various) with placebo

> 50% reduction in depressive symptoms · treatment‐resistant depression in adults

Augmentation of current antidepressant (various) with cariprazine (1… probably leads to higher response (≥ 50% improvement in MADRS score) ‐ any dose compared with augmentation of current antidepressant (various) with placebo (moderate certainty).

1 finding from 1 review

Augmentation of current antidepressant (various) with cariprazine (1 mg/d to 4.5 mg/d) vs augmentation of current antidepressant (various) with placebo

Remission · treatment‐resistant depression in adults

Augmentation of current antidepressant (various) with cariprazine (1… showed no clear difference in remission (MADRS total score ≤ 10) ‐ any dose compared with augmentation of current antidepressant (various) with placebo (moderate certainty).

1 finding from 1 review