Evidence map›Paper›PMID 42071228›Full record

ReviewCardiovascular ultrasound2026

Noise in clinical data: insights from assessment of aortic stenosis by echocardiography.

Joshua N Lloyd, Guy P Armstrong

Abstract readReview
In one paragraph

Review in Cardiovascular ultrasound, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–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

0 citing papers in PubMed.

No citing paper in PubMed yet.

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

2 authors.

Joshua N LloydLakeview Cardiology, North Shore Hospital, Takapuna Auckland, Private Bag 93 503, New Zealand.
Guy P ArmstrongLakeview Cardiology, North Shore Hospital, Takapuna Auckland, Private Bag 93 503, New Zealand. guy.armstrong@waitematadhb.govt.nz.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Noise (synonyms: variability, imprecision) in clinical data is underappreciated. All measurements are affected by noise and bias. Research studies enrol many patients to average out noise and use randomisation and double-blinding to counter bias. These mitigation techniques are often not available in clinical medicine, where individual patients typically have a variable measured only once.The example of echocardiographic assessment of aortic stenosis severity illustrates how the conventional presentation of data as point estimates masks wide variability in noise between variables, which affects utility. Adding aortic valve area to the quantification of aortic stenosis may result in poorer (noisier) estimates.Every clinical variable reported as a point estimate comes with an invisible cloud of uncertainty (noise) of varying size across variables. Being mindful of how this noise varies across variables should facilitate optimal clinical decisions.

Indexed as

Aortic ValveAortic Valve StenosisEchocardiographyHumansReproducibility of ResultsSeverity of Illness IndexAortic stenosisImprecisionMeasurement errorNoiseReproducibilitySurrogate markerVariability

Identifiers

PMID42071228
PMCPMC13137482

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.