Evidence map›Paper›PMID 25789633›Full record

Trial reportPloS one2015

Risk threshold for starting low dose aspirin in pregnancy to prevent preeclampsia: an opportunity at a low cost.

Emily Bartsch, Alison L Park, John C Kingdom, Joel G Ray

Open access · goldAbstract readRandomized Controlled Trial
In one paragraph

Trial report in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed, 2 pooled it
5.1field-weighted citation impact, top 5% 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

13 citing papers in PubMed, 2 syntheses or guidelines pooled it, 33 citations in OpenAlex.

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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.

Emily BartschWestern University, London, Ontario, Canada.
Alison L ParkInstitute for Clinical Evaluative Sciences, Toronto, Ontario, Canada.
John C KingdomDepartment of Obstetrics and Gynaecology, University of Toronto, Toronto, Ontario, Canada.
Joel G RayDepartment of Medicine, St. Michael's Hospital, University of Toronto, Toronto, Ontario, Canada.
University of Toronto · CAWestern University · CAYork University · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundPreeclampsia (PE) increases maternal and perinatal morbidity and mortality. Based on a multitude of data from randomized clinical trials, clinical practice guidelines endorse using ASA to prevent PE in women who are "at risk." However, data are lacking about the level of absolute risk to warrant starting ASA prophylaxis. METHODS AND

findingsWe present two approaches for objectively determining the minimum absolute risk for PE at which ASA prophylaxis is justified. The first is a new approach-the minimum control event rate (CERmin). The second approach uses a pre-existing concept-the minimum event rate for treatment (MERT). Here we show how the CERmin is derived, and then use the CERmin and the MERT to guide us to a reasonable risk threshold for starting a woman on ASA prophylaxis against PE based on clinical risk assessment. We suggest that eligible women need not be at "high risk" for preeclampsia to warrant ASA, but rather at some modestly elevated absolute risk of 6-10%.

conclusionsGiven its very low cost, its widespread availability, ease of administration and its safety profile, ASA is a highly attractive agent for the prevention of maternal and perinatal morbidity worldwide.

Indexed as

AspirinFemaleHumansPre-EclampsiaPregnancyRiskAspirin

Identifiers

PMID25789633
PMCPMC4366221
OpenAlexW2052960582

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.