Evidence map›Paper›PMID 16143039›Full record

ArticleBMC medical genetics2005

No evidence for the association of DRD4 with ADHD in a Taiwanese population within-family study.

Keeley-Joanne Brookes, Xiaohui Xu, Chih-Ken Chen, Yu-Shu Huang, Yu-Yu Wu, Philip Asherson

Open access · goldAbstract read
In one paragraph

Article in BMC medical genetics, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 3 pooled it
1.8field-weighted citation impact, top 17% 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

15 citing papers in PubMed, 3 syntheses or guidelines pooled it, 39 citations in OpenAlex.

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  13. Molecular genetics of attention deficit hyperactivity disorder.The Psychiatric clinics of North America · 2010
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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 at 2 institutions in 2 countries.

Keeley-Joanne BrookesMRC Social Genetic Developmental Psychiatry Centre, Institute of Psychiatry, London, UK. k.brookes@iop.kcl.ac.u
Xiaohui Xu
Chih-Ken Chen
Yu-Shu Huang
Yu-Yu Wu
Philip Asherson
Chang Gung Memorial Hospital · TWPsychiatry Research Trust · GB

Funding

Wellcome Trust
6 · The paper itself

Abstract

backgroundAttention Deficit Hyperactivity Disorder (ADHD) is a prevalent and highly heritable childhood disorder. The dopamine D4 receptor (DRD4) gene has shown a genetic association with ADHD in Caucasian populations with meta-analysis indicating a small but significant effect across datasets. It remains uncertain whether this association can be generalised to non-Caucasian ethnic groups. Here we investigate two markers within the DRD4 gene in a Taiwanese population, the exon 3 variable number tandem repeat (VNTR) and a 5' 120 base-pair duplication.

methodsWithin-family transmission disequilibrium tests of association of the 5' 120 base-pair duplication, and exon 3 VNTR in a Taiwanese population.

resultsNo evidence of association of ADHD with either polymorphism in this population was observed.

conclusionThe DRD4 gene markers investigated were not found to be associated with ADHD in this Taiwanese sample. Further work in Taiwanese and other Asian populations will therefore be required to establish whether the reports of association of DRD4 genetic variants in Caucasian samples can be generalised to Asian populations.

Indexed as

Genetic Predisposition to DiseasePolymorphism, GeneticAdolescentAttention Deficit Disorder with HyperactivityChildChild, PreschoolFamily HealthGene FrequencyHumansReceptors, Dopamine D2Receptors, Dopamine D4TaiwanTandem Repeat SequencesDRD4 protein, humanReceptors, Dopamine D2Receptors, Dopamine D4

Identifiers

PMID16143039
PMCPMC1236928
OpenAlexW1509504473

What OpenQuestion holds

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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.