ICU sedation, delirium & recovery

Positive single-center randomized trials and subsequent multicenter randomized trials in critically ill patients: a systematic review

Crit CarePublished Systematic review of randomised trials

Authors' conclusion

Mortality reduction shown by sRCTs is typically not replicated by mRCTs.

Study context

Population
Adult critically ill patients; sRCTs with significant mortality reduction published in NEJM, JAMA or Lancet until December 31, 201619 sRCTs
Comparison
Positive single-centre RCTs (sRCTs) vs subsequent multicentre RCTs (multicenter randomized controlled trials (mRCTs)) on the same question
Outcome
Replication of significant mortality reduction by subsequent mRCTs

Pooled result

As reported in the abstract

Concordance of mortality results between sRCTs and subsequent mRCTs
sRCTs with at least one subsequent mRCT (24 mRCTs in total)
16
sRCTs not yet addressed by a subsequent mRCT
three
sRCTs followed by mRCT replicating significant mortality reduction
one out of 16 (6%)
sRCTs followed by mRCTs with no mortality difference
14 (88%)
sRCT (intensive glycemic control) contradicted by mRCT showing significant mortality increase
one (6%)

Further pooled results

Guideline status of sRCTs referenced in international guidelines

sRCTs referenced at least once in international guidelines
14
Since removed or suggested against in most recent guidelines
six (43%)

Original publication

Positive single-center randomized trials and subsequent multicenter randomized trials in critically ill patients: a systematic review. Crit Care. Published 28 November 2023. doi:10.1186/s13054-023-04755-5

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