Internal and external validity of cluster randomised trials: systematic review of recent trials.

Eldridge S, Ashby D, Bennett C, Wakelin M, Feder G

DOI: 10.1136/bmj.39517.495764.25
Published: 2008 Apr 19
Container: BMJ (Clinical research ed.)
Publisher: Not recorded
Open access: yes

Credibility signals

limited evidence Score 45/100 under policy 1.0.0. This is a metadata assessment, not a judgment of the paper's conclusions.

Show all credibility signals

cautionDOI registered: No matching Crossref record was present in this response. Source: Crossref; license: CC0 metadata
cautionDOI resolves: No matching Crossref record was present in this response. Source: Crossref; license: CC0 metadata
not scoredDirectory of Open Access Journals: No matching DOAJ record was present in this response. No allow-list match; this is not evidence of low credibility. Source: DOAJ; license: CC0
not scoredMEDLINE indexed: Not checked or no result supplied; no credibility inference made. Source: No authority result supplied; license: Unknown
not scoredOpenAlex core source: Not checked or no result supplied; no credibility inference made. Source: No authority result supplied; license: Unknown
not scoredKnown publisher allow-list: Not checked or no result supplied; no credibility inference made. Source: No authority result supplied; license: Unknown
not scoredROR affiliation: Not checked or no result supplied; no credibility inference made. Source: No authority result supplied; license: Unknown
not scoredRetraction Watch retraction: No retraction notice matched this DOI in the deployed snapshot. No matching event found; coverage may be incomplete. Source: Retraction Watch; license: CC BY 4.0
not scoredRetraction Watch expression of concern: No expression of concern notice matched this DOI in the deployed snapshot. No matching event found; coverage may be incomplete. Source: Retraction Watch; license: CC BY 4.0
not scoredRetraction Watch correction: No correction notice matched this DOI in the deployed snapshot. No matching event found; coverage may be incomplete. Source: Retraction Watch; license: CC BY 4.0
not scoredRetraction Watch reinstatement: No reinstatement notice matched this DOI in the deployed snapshot. No matching event found; coverage may be incomplete. Source: Retraction Watch; license: CC BY 4.0
supportingOpen access status: Normalized open-access status: open. Source: Normalized work metadata; license: Caller-provided; provenance license not supplied to scorer
not scoredPublication license: Not checked or no result supplied; no credibility inference made. Source: No authority result supplied; license: Unknown
not scoredPublication version: A publication version was supplied but is not scored. Source: Normalized work metadata; license: Caller-provided; provenance license not supplied to scorer
cautionMetadata completeness: 5 of 6 scored descriptive metadata groups are present; missing fields increase uncertainty. Source: Normalized work metadata; license: Caller-provided; provenance license not supplied to scorer

Cite this work

BibTeX

@article{allodium:10.1136/bmj.39517.495764.25,
  title = {Internal and external validity of cluster randomised trials: systematic review of recent trials.},
  author = {Eldridge S and Ashby D and Bennett C and Wakelin M and Feder G},
  year = {2008},
  journal = {BMJ (Clinical research ed.)},
  doi = {10.1136/bmj.39517.495764.25},
  url = {https://doi.org/10.1136/bmj.39517.495764.25}
}

RIS

TY  - JOUR
TI  - Internal and external validity of cluster randomised trials: systematic review of recent trials.
AU  - Eldridge S
AU  - Ashby D
AU  - Bennett C
AU  - Wakelin M
AU  - Feder G
PY  - 2008
JO  - BMJ (Clinical research ed.)
DO  - 10.1136/bmj.39517.495764.25
UR  - https://doi.org/10.1136/bmj.39517.495764.25
ER  -

APA

S, E., D, A., C, B., M, W., & G, F. (2008). Internal and external validity of cluster randomised trials: systematic review of recent trials.. BMJ (Clinical research ed.). https://doi.org/10.1136/bmj.39517.495764.25

Source records

pubmed · retrieved 2026-09-26T12:56:03.863Z