Evidence map›Paper›PMID 29025131›Full record

ArticleInternational journal of epidemiology2017

A guide to evaluating linkage quality for the analysis of linked data.

Katie L Harron, James C Doidge, Hannah E Knight, Ruth E Gilbert, Harvey Goldstein, David A Cromwell, Jan H van der Meulen

Abstract read
In one paragraph

Article in International journal of epidemiology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 79 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
79citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

79 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  18. Assessing Real-World Data From Electronic Health Records for Health Technology Assessment: The SUITABILITY Checklist: A Good Practices Report of an ISPOR Task Force.Value in health : the journal of the International Society for Pharmacoeconomics and Outcomes Research · 2024
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19 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Katie L HarronDepartment of Health Services Research and Policy, London School of Hygiene & Tropical Medicine, London, UK.
James C DoidgeAdministrative Data Research Centre for England, UCL Great Ormond Street Institute of Child Health, UCL, London, UK.
Hannah E KnightDepartment of Health Services Research and Policy, London School of Hygiene & Tropical Medicine, London, UK.
Ruth E GilbertAdministrative Data Research Centre for England, UCL Great Ormond Street Institute of Child Health, UCL, London, UK.
Harvey GoldsteinAdministrative Data Research Centre for England, UCL Great Ormond Street Institute of Child Health, UCL, London, UK.
David A CromwellDepartment of Health Services Research and Policy, London School of Hygiene & Tropical Medicine, London, UK.
Jan H van der MeulenDepartment of Health Services Research and Policy, London School of Hygiene & Tropical Medicine, London, UK.

Funding

Medical Research Council MR/K006584/1Wellcome Trust 103975/Z/14/Z
6 · The paper itself

Abstract

Linked datasets are an important resource for epidemiological and clinical studies, but linkage error can lead to biased results. For data security reasons, linkage of personal identifiers is often performed by a third party, making it difficult for researchers to assess the quality of the linked dataset in the context of specific research questions. This is compounded by a lack of guidance on how to determine the potential impact of linkage error. We describe how linkage quality can be evaluated and provide widely applicable guidance for both data providers and researchers. Using an illustrative example of a linked dataset of maternal and baby hospital records, we demonstrate three approaches for evaluating linkage quality: applying the linkage algorithm to a subset of gold standard data to quantify linkage error; comparing characteristics of linked and unlinked data to identify potential sources of bias; and evaluating the sensitivity of results to changes in the linkage procedure. These approaches can inform our understanding of the potential impact of linkage error and provide an opportunity to select the most appropriate linkage procedure for a specific analysis. Evaluating linkage quality in this way will improve the quality and transparency of epidemiological and clinical research using linked data.

Indexed as

Computer SecurityData AccuracyAlgorithmsBiasHumansMedical Record LinkageSemantic Webadministrative databiasdata accuracydata linkagehospital recordslinkage errorRecord linkageselection biassensitivity and specificity

Identifiers

PMID29025131
PMCPMC5837697

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.