Evidence map›Paper›PMID 28560811›Full record

ArticleHealth services research2018

Comparing the Effectiveness of Dynamic Treatment Strategies Using Electronic Health Records: An Application of the Parametric g-Formula to Anemia Management Strategies.

Yi Zhang, Jessica G Young, Mae Thamer, Miguel A Hernán

Open access · bronzeAbstract read
In one paragraph

Article in Health services research, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed, 1 pooled it
2.3field-weighted citation impact, top 11% of its field
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

24 citing papers in PubMed, 1 synthesis or guideline pooled it, 41 citations in OpenAlex.

  1. Pooled it
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  17. Contemporary use of real-world data for clinical trial conduct in the United States: a scoping review.Journal of the American Medical Informatics Association : JAMIA · 2021
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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

4 authors at 3 institutions in 1 country.

Yi ZhangMedical Technology and Practice Patterns Institute, Bethesda, MD.
Jessica G YoungDepartment of Population Medicine, Harvard Medical School, Boston, MA.
Mae ThamerMedical Technology and Practice Patterns Institute, Bethesda, MD.
Miguel A HernánDepartments of Epidemiology and Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA.
Medical Technology and Practice Patterns Institute · USHarvard–MIT Division of Health Sciences and Technology · USHarvard University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo compare the effectiveness of dynamic anemia management strategies by applying the parametric g-formula to electronic health records. DATA SOURCE/STUDY

settingPatients with end-stage renal disease from the US Renal Data System who had congestive heart failure or ischemic heart disease and were undergoing hemodialysis in outpatient dialysis facilities between 2006 and 2010. STUDY

designWe explicitly emulated a target trial of three ‎erythropoietin dosing strategies (aimed at achieving a low, middle, or high hematocrit) and estimated the observational analog of the per-protocol effect.

resultsOf 156,945 eligible patients, 41,970 died during the 18-month follow-up. Compared to the low-hematocrit strategy, the estimated risk of death was 4.6 (95% CI 4.4-4.9) percentage points higher under the high-hematocrit strategy and 1.8 (95% CI 1.7-1.9) percentage points higher under the mid-hematocrit strategy. The corresponding risk differences for a composite outcome of death and myocardial infarction were similar.

conclusionAn explicit emulation of a target trial using electronic health records, combined with the parametric g-formula, allowed comparison of real-world dynamic strategies that have not been compared in randomized trials.

Indexed as

HematocritResearch DesignAnemiaDose-Response Relationship, DrugElectronic Health RecordsEpoetin AlfaHeart FailureHumansKidney Failure, ChronicMyocardial IschemiaOutcome and Process Assessment, Health CareRandomized Controlled Trials as TopicRenal DialysisEpoetin Alfacausal inferencecomparative effectiveness researchParametric g-formulatarget trial

Identifiers

PMID28560811
PMCPMC5980367
OpenAlexW2620457087

What OpenQuestion holds

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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.