Evidence map›Paper›PMID 26993487›Full record

ArticleJournal of abnormal child psychology2016

Does the Environment Have an Enduring Effect on ADHD? A Longitudinal Study of Monozygotic Twin Differences in Children.

Luisa T Livingstone, William L Coventry, Robin P Corley, Erik G Willcutt, Stefan Samuelsson, Richard K Olson, Brian Byrne

Abstract readTwin Study
In one paragraph

Article in Journal of abnormal child psychology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
8citing 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

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

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Review
  6. Article
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  8. Article
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

7 authors.

Luisa T LivingstoneSchool of Behavioural, Cognitive, and Social Sciences, University of New England, Armidale, NSW, Australia. luisa.livingstone@gmail.com.
William L CoventrySchool of Behavioural, Cognitive, and Social Sciences, University of New England, Armidale, NSW, Australia.
Robin P CorleyInstitute for Behavioral Genetics, University of Colorado, Boulder, CO, USA.
Erik G WillcuttInstitute for Behavioral Genetics, University of Colorado, Boulder, CO, USA.
Stefan SamuelssonDepartment of Behavioral Sciences, Linköping University, Linköping, Sweden.
Richard K OlsonInstitute for Behavioral Genetics, University of Colorado, Boulder, CO, USA.
Brian ByrneSchool of Behavioural, Cognitive, and Social Sciences, University of New England, Armidale, NSW, Australia.

Funding

VALIDITY OF SUBTYPES OF ADHDP50HD027802 · NICHD · UNIVERSITY OF COLORADO AT BOULDER · PI ERIK G WILLCUTT · 1990 to 2026
$44.9M
Longitudinal Twin Study of Early Reading Development (supplement)R01HD038526 · NICHD · UNIVERSITY OF COLORADO AT BOULDER · PI OLSON, RICHARD K · 2000 to 2010
$4.2M
NICHD NIH HHS P50 HD027802NICHD NIH HHS R01 HD038526
6 · The paper itself

Abstract

Environmental factors play a key role in the development of Attention-Deficit/Hyperactivity Disorder (ADHD), but the long-term effects of these factors are still unclear. This study analyses data from 1024 monozygotic (identical) twins in Australia, the United States, and Scandinavia who were assessed for ADHD in Preschool, Kindergarten, Grade 1, and Grade 2. Differences within each twin pair were used as a direct measure of non-shared environmental effects. The Trait-State-Occasion (TSO) model developed by Cole et al. (Psychological Methods, 10, 3-20, 2005) was used to separate the non-shared environmental effects into stable factors, and transient factors that excluded measurement error. Stable factors explained, on average, 44 % and 39 % of the environmental variance in hyperactive-impulsive and inattentive symptoms, respectively. Transient effects explained the remaining 56 % and 60 % of variance. The proportion of stable variance was higher than expected based on previous research, suggesting promise for targeted interventions if future research identifies these stable risk factors.

Indexed as

Attention Deficit Disorder with HyperactivityChild, PreschoolDiseases in TwinsEnvironmentFemaleGene-Environment InteractionHumansLongitudinal StudiesMaleModels, TheoreticalTwins, MonozygoticADHDEnvironmentGeneticsLongitudinalTwins

Identifiers

PMID26993487
PMCPMC5027180

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.