Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1,655 questions · 1,751 findings · 147 reviews · Pain, Palliative and Supportive Care

No studies found 361 · 20.6%GRADE not reported 87 · 5%Very low 625 · 35.7%Low 367 · 21%Moderate 232 · 13.2%High 79 · 4.5%

tDCS vs sham

Patient‐reported pain intensity or pain relief (VAS, NRS or categorical scale) · adults with chronic pain

It is very uncertain whether transcranial direct current stimulation (tDCS) changes pain intensity (0 to < 1 week postintervention) measured using… compared with sham (very low certainty).

1 finding from 1 review

Serotonin and noradrenaline reuptake inhibitors (SNRI) vs placebo

Patient Global Impression of Change much or very much improved · patients with fibromyalgia

Serotonin noradrenaline reuptake inhibitors may leads to higher patient Global Impression to be much or very much improved (PGIC) compared with placebo (low certainty).

1 finding from 1 review

Serotonin and noradrenaline reuptake inhibitors (SNRI) vs placebo

Participant‐reported sleep problems (scale: 0 to 28; higher scores indicate more sleep problems) · patients with fibromyalgia

Serotonin noradrenaline reuptake inhibitors showed no clear difference in self‐reported sleep problems (0‐100 scale) Higher scores indicate… compared with placebo (low certainty).

1 finding from 1 review

Serotonin and noradrenaline reuptake inhibitors (SNRI) vs placebo

Self‐reported health‐related quality of life (0‐100 scale) Higher scores indicate higher burden of disease (lower quality of life) · patients with fibromyalgia

Serotonin noradrenaline reuptake inhibitors showed no clear difference in self‐reported health‐related quality of life (0‐100 scale) Higher… compared with placebo (low certainty).

1 finding from 1 review