Evidence map›Paper›PMID 18252216›Full record

ArticleAmerican journal of human genetics2008

A unified association analysis approach for family and unrelated samples correcting for stratification.

Xiaofeng Zhu, Shengchao Li, Richard S Cooper, Robert C Elston

Abstract read
In one paragraph

Article in American journal of human genetics, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 86 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
86citing 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

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

  1. Pooled it
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  7. Efficient Federated Kinship Relationship Identification.AMIA Joint Summits on Translational Science proceedings. AMIA Joint Summits on Translational Science · 2023
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26 more citing papers are in PubMed but not listed here.

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

4 authors.

Xiaofeng ZhuDepartment of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, OH 44106, USA. xzhu1@darwin.case.edu
Shengchao Li
Richard S Cooper
Robert C Elston

Funding

Statistical methods for analyzing high-throughput genotype dataR01HG003054 · NHGRI · LOYOLA UNIVERSITY CHICAGO · PI ZHU, XIAOFENG · 2005 to 2017
$3.6M
GENETIC ANALYSIS OF MULTIFACTORIAL TRAITSR37GM028356 · NIGMS · CASE WESTERN RESERVE UNIVERSITY · PI ELSTON, ROBERT C. · 1998 to 2007
$2.9M
Defining an Obesity QTL on Chromosome 3qR01HL074166 · NHLBI · LOYOLA UNIVERSITY CHICAGO · PI ZHU, XIAOFENG · 2004 to 2007
$2.9M
GENETIC ANALYSIS OF MULTIFACTORIAL TRAITSR01GM028356 · NIGMS · LOUISIANA STATE UNIV HSC NEW ORLEANS · PI ELSTON, ROBERT C. · 1985 to 1997
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NHGRI NIH HHS HG003054NHGRI NIH HHS R01 HG003054NHLBI NIH HHS HL074166NHLBI NIH HHS R01 HL074166NIGMS NIH HHS GM28356NIGMS NIH HHS R01 GM028356NIGMS NIH HHS R37 GM028356PHS HHS P30CAD43703
6 · The paper itself

Abstract

There are two common designs for association mapping of complex diseases: case-control and family-based designs. A case-control sample is more powerful to detect genetic effects than a family-based sample that contains the same numbers of affected and unaffected persons, although additional markers may be required to control for spurious association. When family and unrelated samples are available, statistical analyses are often performed in the family and unrelated samples separately, conditioning on parental information for the former, thus resulting in reduced power. In this report, we propose a unified approach that can incorporate both family and case-control samples and, provided the additional markers are available, at the same time corrects for population stratification. We apply the principal components of a marker matrix to adjust for the effect of population stratification. This unified approach makes it unnecessary to perform a conditional analysis of the family data and is more powerful than the separate analyses of unrelated and family samples, or a meta-analysis performed by combining the results of the usual separate analyses. This property is demonstrated in both a variety of simulation models and empirical data. The proposed approach can be equally applied to the analysis of both qualitative and quantitative traits.

Indexed as

Genetics, PopulationModels, GeneticQuantitative Trait, HeritableResearch DesignComputer SimulationData Interpretation, StatisticalFamily CharacteristicsGenetic Diseases, InbornHumansMicrosatellite RepeatsMutationPeptidyl-Dipeptidase APrincipal Component AnalysisPeptidyl-Dipeptidase A

Identifiers

PMID18252216
PMCPMC2427300

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.