Evidence map›Paper›PMID 9736746›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America1998

Tests and estimates of allelic association in complex inheritance.

N E Morton, A Collins

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 1998. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers.

0numbers the graph read from it
0cells of the map it votes in
47citing 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

47 citing papers in PubMed.

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  9. DRD4 and DAT1 in ADHD: Functional neurobiology to pharmacogenetics.Pharmacogenomics and personalized medicine · 2010
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  11. Recent advances in genetic predisposition to clinical acute lung injury.American journal of physiology. Lung cellular and molecular physiology · 2009
    Review
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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

2 authors.

N E MortonHuman Genetics, University of Southampton, Level G, Princess Anne Hospital, Coxford Road, Southampton SO16 5YA, United Kingdom. nem@soton.ac.uk
A Collins

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Family-based procedures such as the transmission disequilibrium test (TDT) were motivated by concern that sample-based methods to map disease genes by allelic association are not robust to population stratification, migration, and admixture. Other factors to consider in designing a study of allelic association are specification of gene action in a weakly parametric model, efficiency, diagnostic reliability for hypernormal individuals, interest in linkage and imprinting, and sibship composition. Family-based samples lend themselves to the TDT despite its inefficiency compared with cases and unrelated normal controls. The TDT has an efficiency of 1/2 for parent-offspring pairs and 2/3 for father-mother-child trios. Against cases and hypernormal controls, the efficiency is only 1/6 on the null hypothesis. Although dependent on marker gene frequency and other factors, efficiency for hypernormal controls is always greater than for random controls. Efficiency of the TDT is increased in multiplex families and by inclusion of normal sibs, approaching a case-control design with normal but not hypernormal controls. Isolated cases favor unrelated controls, and only in exceptional populations would avoidance of stratification justify a family-based design to map disease genes by allelic association.

Indexed as

AllelesChromosome MappingCase-Control StudiesDiabetes Mellitus, Type 1FamilyFemaleGenetic Diseases, InbornGenetic LinkageGenetic MarkersGeneticsHumansMaleGenetic Markers

Identifiers

PMID9736746
PMCPMC21652

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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.