Lars Beckmann

Impact of genotyping errors on the type I error rate and the power of haplotype-based association methods (2009)

Marquard, Vivien, Beckmann, Lars, Heid, Iris M, Lamina, Claudia, Chang-Claude, Jenny

Abstract Background We investigated the influence of genotyping errors on the type I error rate and empirical power of two haplotype based association methods applied to candidate regions. We...

CYP450 polymorphisms as risk factors for early-onset lung cancer: gender-specific differences (2009)

Timofeeva, Maria N., Kropp, Silke, Sauter, Wiebke, Beckmann, Lars, Rosenberger, Albert, Illig, Thomas, ...

Cytochrome P450 (CYP) enzymes, involved in metabolism of tobacco carcinogens, are also involved in estrogen metabolism and many are regulated by estrogens. These genes may thus be of relevance to...

G72 and its association with major depression and neuroticism in large population-based groups from Germany (2008)

Rietschel, Marcella, Beckmann, Lars, Strohmeier, Jana, Georgi, Alexander, Karpushova, Anna, Schirmbeck, Frederike, ...

OBJECTIVE: G72 is among the most frequently replicated vulnerability genes for schizophrenia and bipolar disorder. The authors previously found identical haplotypes of markers M23 and M24 to be...

Comparison of measures for haplotype similarity (2007)

Marquard, Vivien, Beckmann, Lars, Bermejo, Justo L, Fischer, Christine, Chang-Claude, Jenny

Abstract Measuring the association of haplotype similarities with phenotype similarities has been used to develop statistical tests of genetic association. Previously, we applied the general approach...

Haplotype-sharing analysis using Mantel statistics for combined genetic effects (2005)

Beckmann, Lars, Fischer, Christine, Obreiter, Markus, Rabes, Michael, Chang-Claude, Jenny

Abstract We applied a new approach based on Mantel statistics to analyze the Genetic Analysis Workshop 14 simulated data with prior knowledge of the answers. The method was developed in order to...

Haplotype Sharing Analysis With SNPs in Candidate Genes: The Genetic Analysis Workshop 12 Example (2003)

Fischer, Christine, Beckmann, Lars, Majoram, Paul, Meerman, Gerard Te, Chang-Claude, Jenny

Haplotype sharing analysis was used to investigate the association of affection status with single nucleotide polymorphism (SNP) haplotypes within candidate gene 1 in one sample each from the...

Minimum-recombinant haplotyping in pedigrees (2002)

Dajun Qian, Lars Beckmann

This article presents a six-rule algorithm for the reconstruction of multiple minimum-recombinant haplotype configurations in pedigrees. The algorithm has three major features: First, it allows...

Minimum-Recombinant Haplotyping in Pedigrees

Qian, Dajun, Beckmann, Lars

This article presents a six-rule algorithm for the reconstruction of multiple minimum-recombinant haplotype configurations in pedigrees. The algorithm has three major features: First, it allows...

Comparison of the power of haplotype-based versus single- and multilocus association methods for gene × environment (gene × sex) interactions and application to gene × smoking and gene × sex interactions in rheumatoid arthritis

Dempfle, Astrid, Hein, Rebecca, Beckmann, Lars, Scherag, André, Nguyen, Thuy Trang, Schäfer, Helmut, ...

Accounting for interactions with environmental factors in association studies may improve the power to detect genetic effects and may help identifying important environmental effect modifiers. The...

Comparison of measures for haplotype similarity

Marquard, Vivien, Beckmann, Lars, Bermejo, Justo L, Fischer, Christine, Chang-Claude, Jenny

Measuring the association of haplotype similarities with phenotype similarities has been used to develop statistical tests of genetic association. Previously, we applied the general approach of...