Botulinum toxin type A vs placebo: Duration of effect 618 participants (5 RCTs)
It is very uncertain whether botulinum toxin type A changes duration of effect 618 participants (5 RCTs) compared with placebo (very low certainty).
What each review found
Include earlier review versions| Finding | Effect | Studies | GRADE certainty |
|---|---|---|---|
Botulinum toxin type A vs placebo Duration of effect 618 participants (5 RCTs) · cervical dystonia It is very uncertain whether botulinum toxin type A changes duration of effect 618 participants (5 RCTs) compared with placebo (very low certainty). Botulinum toxin type A therapy for cervical dystonia (2020) · Cochrane Headline outcomes only | no estimate extracted | Not reported | Very low |
Findings are shown side by side, never pooled across reviews.
The reviews
| Review | Searched up to | Included studies | AMSTAR 2 |
|---|---|---|---|
| Botulinum toxin type A therapy for cervical dystonia 2020 · Cochrane Headline outcomes only | Not reported | list not extracted yet | Not assessed |
Studies behind the findings
None of these reviews ties its included studies to this outcome in the data here. Cochrane reviews and reviews with headline outcomes only do not list their studies yet.
How reviews are matched to this question
Reviews word the same question differently. Four decision models (TypeSafe's Jev, Liquid AI's d1-ultra, SubQ Snap and Baseten's Elephant) judged each wording of the population, intervention, comparator and outcome against the others; two wordings count as the same when at least three of them agree and none clearly disagrees, and findings count as this question only when all four elements match. Timing, setting and subgroup never split a question: they are shown on each finding.