Using classification and regression trees (CART) to investigate unknown ethnicity records in NHS emergency care data

Grace Dean, Roy A Ruddle

Open source

DOI: 10.1136/bmjopen-2026-118200
Published: 2026-08
Container: BMJ Open
Publisher: BMJ
Open access: unknown

Credibility signals

uncertain Score 64/100 under policy 1.0.0. This is a metadata assessment, not a judgment of the paper's conclusions.

Show all credibility signals

supportingDOI registered: A matching record was returned by Crossref. Source: Crossref; license: CC0 metadata
supportingDOI resolves: A matching record was returned by Crossref. 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
not scoredOpen access status: Not checked or no result supplied; no credibility inference made. Source: No authority result supplied; license: Unknown
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
supportingMetadata completeness: All 6 scored descriptive metadata groups are present. Source: Normalized work metadata; license: Caller-provided; provenance license not supplied to scorer

Cite this work

BibTeX

@article{allodium:10.1136/bmjopen-2026-118200,
  title = {Using classification and regression trees (CART) to investigate unknown ethnicity records in NHS emergency care data},
  author = {Grace Dean and Roy A Ruddle},
  year = {2026},
  journal = {BMJ Open},
  doi = {10.1136/bmjopen-2026-118200},
  url = {https://doi.org/10.1136/bmjopen-2026-118200}
}

RIS

TY  - JOUR
TI  - Using classification and regression trees (CART) to investigate unknown ethnicity records in NHS emergency care data
AU  - Grace Dean
AU  - Roy A Ruddle
PY  - 2026
JO  - BMJ Open
DO  - 10.1136/bmjopen-2026-118200
UR  - https://doi.org/10.1136/bmjopen-2026-118200
ER  -

APA

Dean, G., & Ruddle, R. A. (2026). Using classification and regression trees (CART) to investigate unknown ethnicity records in NHS emergency care data. BMJ Open. https://doi.org/10.1136/bmjopen-2026-118200

Source records

crossref · retrieved 2026-09-25T22:24:00.649Z