What do systematic reviews say?

tDCS plus speech and language therapy (SLT) vs sham tDCS plus SLT

• Transcranial direct current stimulation (tDCS) for improving aphasia in adults with aphasia after stroke 2019 · Cochrane Headline outcomes only
  no estimate extracted
  3 studies · 112 participants
  Low
• Transcranial direct current stimulation (tDCS) for improving aphasia in adults with aphasia after stroke 2019 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 80 participants
  Very low

Summary of findings: SLT vs social support and stimulation

The review found no eligible studies for this question.

• Speech and language therapy for aphasia following stroke 2016 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Summary of findings: SLT vs no SLT (immediate outcome)

Summary of findings: SLT probably leads to higher functional communication compared with no SLT (immediate outcome) (moderate certainty).

• Speech and language therapy for aphasia following stroke 2016 · Cochrane Headline outcomes only
  SMD 0.28 [0.06, 0.49]
  10 studies · 376 participants
  Moderate

Summary of findings: SLT A vs SLT B

Summary of findings: SLT A may leads to higher functional communication compared with SLT B (low certainty).

• Speech and language therapy for aphasia following stroke 2016 · Cochrane Headline outcomes only
  MD 11.75 [4.09, 19.4]
  2 studies · 84 participants
  Low

Summary of findings: SLT vs no SLT (follow‐up at 6 months)

It is very uncertain whether summary of findings: SLT changes functional communication (6 months compared with no SLT (follow‐up at 6 months) (very low certainty).

• Speech and language therapy for aphasia following stroke 2016 · Cochrane Headline outcomes only
  SMD 0.19
  2 studies · 111 participants
  Very low