Response to Werler and Parker letter: Comment on live-birth bias in pregnancy cohorts.

Zeyan Liew, Jørn Olsen, Xin Cui, Beate Ritz, Onyebuchi A Arah

Abstract readLetterComment

In one paragraph

Article in International journal of epidemiology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it

0cells of the map it votes in

3citing 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

3 citing papers in PubMed.

Environmental hazards, social inequality, and fetal loss: Implications of live-birth bias for estimation of disparities in birth outcomes.Environmental epidemiology (Philadelphia, Pa.) · 2021
Article
The curse of the perinatal epidemiologist: inferring causation amidst selection.Current epidemiology reports · 2018
Article
Left Truncation Bias to Explain the Protective Effect of Smoking on Preeclampsia: Potential, But How Plausible?Epidemiology (Cambridge, Mass.) · 2017
Article

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors.

Zeyan LiewDepartment of Epidemiology, Fielding School of Public Health, University of California, Los Angeles, CA, USA, zeyanliew@ucla.edu.

Jørn OlsenDepartment of Epidemiology, Fielding School of Public Health, University of California, Los Angeles, CA, USA, Department of Public Health, Section for Epidemiology, University of Aarhus, Aarhus, Denmark.

Xin CuiDepartment of Epidemiology, Fielding School of Public Health, University of California, Los Angeles, CA, USA.

Beate RitzDepartment of Epidemiology, Fielding School of Public Health, University of California, Los Angeles, CA, USA, Department of Neurology, Geffen School of Medicine, University of California, Los Angeles, CA, USA.

Onyebuchi A ArahDepartment of Epidemiology, Fielding School of Public Health, University of California, Los Angeles, CA, USA, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands and UCLA Center for Health Policy Research, Los Angeles, CA, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

PubMed holds no abstract for this paper.

Indexed as

Attention Deficit Disorder with HyperactivityEnvironmental PollutantsFemaleFluorocarbonsHumansPregnancyPregnancy OutcomePrenatal Exposure Delayed EffectsEnvironmental PollutantsFluorocarbons

Identifiers

PMID26163685

DOI10.1093/ije/dyv140

What OpenQuestion holds

Textmetadata

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.