Universitat, SalutFabra, PompeuMajo FC, 2008. Selection and linkage desequilibrium tests under complex demographies and ascertainment bias. Departament de Ciencies Experimentals i de la Salut, Universitat Pompeu Fabra (UPF). PhD dissertation. Barcelona.
whereby support for clades that do not include the reference taxon cannot be directly observed. Here we have developed a new statistical framework that accounts for this ascertainment bias, allowing us to employ phylogenetically powerful retrotransposon markers to explore the ...
Population genetic studies based on genotyped single nucleotide polymorphisms (SNPs) are influenced by a non-random selection of the SNPs included in the used genotyping arrays. The resulting bias in the estimation of allele frequency spectra and populat
In family-based association analysis, each family is typically ascertained from a single proband, which renders the effects of ascertainment bias heterogeneous among family members. This is contrary to case–control studies, and may introduce sample or ascertainment bias. Statistical efficiency is affecte...
Studies were classified as having a low, high, or unclear risk of bias for 4 domains (patient selection, index test, reference standard, and flow and timing) and the first 3 domains were also assessed for applicability to the review question (see Supplemental Methods in Additional file 1...
This could potentially cause selection and recruitment bias. To minimize this bias, purposive sampling was conducted by targeting those with the highest LDL-c levels, with study invitations sent to all patients in the highest LDL-c groups of 7.0 mmol/L or more and 6.0-6.9 mmol/L, while an...
This can result in selection bias due to not identifying specific groups of patients including some with high early case fatality and those living in healthcare facilities.doi:10.1111/ane.13187J.AkedH.DelavaranB.NorrvingA.LindgrenActa Neurol ScandActa neurologica Scandinavica...
Heslot, N., Rutkoski, J., Poland, J., Jannink, J.-L., and Sorrells, M. E. (2013). Impact of marker ascertainment bias on genomic selection accuracy and estimates of genetic diversity. PLoS ONE 8:e74612. doi: 10.1371/journal.pone.0074612...