Evidence map›Paper›PMID 29346474›Full record

ArticleAmerican journal of epidemiology2018

Examining Nonparticipation in the Maternal Follow-up Within the Danish National Birth Cohort.

Mette Bliddal, Zeyan Liew, Anton Pottegård, Helene Kirkegaard, Jørn Olsen, Ellen A Nohr

Abstract read
In one paragraph

Article in American journal of epidemiology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing 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

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

  1. Pooled it
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  12. The PRIDE Study: Evaluation of online methods of data collection.Paediatric and perinatal epidemiology · 2020
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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

6 authors.

Mette BliddalOdense Patient Data Explorative Network.
Zeyan LiewDepartment of Epidemiology, Fielding School of Public Health, University of California, Los Angeles, Los Angeles, California.
Anton PottegårdResearch Unit of Clinical Pharmacology and Pharmacy, Department of Public Health, Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark.
Helene KirkegaardResearch Unit of Gynecology and Obstetrics, Department of Clinical Research, Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark.
Jørn OlsenDepartment of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark.
Ellen A NohrResearch Unit of Gynecology and Obstetrics, Department of Clinical Research, Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark.

Funding

Neurodevelopmental effects of Perfluorinated ChemicalsK99ES026729 · NIEHS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI LIEW, ZEYAN · 2017 to 2018
$317k
NIEHS NIH HHS K99 ES026729
6 · The paper itself

Abstract

A follow-up questionnaire on maternal health was distributed within the Danish National Birth Cohort (established in 1996-2002) 14 years after the index birth. Responses were obtained from 41,466 (53.2%) of 78,010 eligible mothers. To ensure the appropriate use of these data, the possibility of selection bias due to nonparticipation had to be evaluated. We estimated 4 selected exposure-outcome associations (prepregnancy weight-depression; exercise-degenerative musculoskeletal conditions; smoking-heart disease; and alcohol consumption-breast cancer). We adjusted for several factors associated with participation and applied inverse probability weighting. To estimate the degree of selection bias, we calculated relative odds ratios for the relationship between the baseline cohort and the subset participating in the Maternal Follow-up. Participating women were generally healthier, of higher social status, and older than the baseline cohort. However, selection bias in the chosen scenarios was limited; ratios of the odds ratios ranged from -14% to 5% after adjustment for age, parity, social status, and, if the variable was not the exposure variable, prepregnancy body mass index, exercise, smoking, and alcohol consumption. Applying inverse probability weighting did not further reduce bias. In conclusion, while participants differed somewhat from the baseline cohort, selection bias was limited after factors associated with participation status were accounted for.

Indexed as

AdultCohort StudiesDenmarkFemaleFollow-Up StudiesHumansInfant, NewbornMiddle AgedMothersOdds RatioPregnancyResearch SubjectsSelection Bias

Identifiers

PMID29346474
PMCPMC6030819

What OpenQuestion holds

Textmetadata
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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.