Twin Concordance Data
Twin Concordance Data - Related Videos
01:20
Kendall's Coefficient of Concordance
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2025
Kendall's Coefficient of Concordance (W), also known as Kendall's W, is a non-parametric statistical measure used to assess the agreement or concordance between multiple raters or judges when they rank a set of items. It is often used when you have ordinal data (ranks) and you want to see if there is consistency or consensus among the raters. It is widely applied in research areas such as psychology, medicine, and social sciences, where multiple judges are asked to rank or rate subjects or...
06:30
Cell Lineage Analyses and Gene Function Studies Using Twin-spot MARCM
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Cited by 2 •
2017
Here, we present a protocol for a mosaic labeling technique that permits the visualization of neurons derived from a common progenitor cell in two distinct colors. This facilitates neural lineage analysis with the capability of birth-dating individual neurons and studying gene function in the same neurons of different individuals.
09:04
Guide Wire Assisted Catheterization and Colored Dye Injection for Vascular Mapping of Monochorionic Twin Placentas
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2011
Vascular mapping of monochorionic (MC) twin placentas after birth provides a means for detailed demonstration of vascular connections between the twins’ circulations. Imbalance of these connections is thought to play a pivotal role in the development of complications of MC twinning including twin-to-twin transfusion syndrome.
18:27
One-step Purification of Twin-Strep-tagged Proteins and Their Complexes on Strep-Tactin Resin Cross-linked With Bis(sulfosuccinimidyl) Suberate (BS3)
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Cited by 12 •
2014
A method is described for efficient purification of twin-Strep-tagged fusion proteins and their specific complexes on modified streptavidin (Strep-Tactin) resin covalently cross-linked with Bis(sulfosuccinimidyl) suberate (BS3). The method has the advantages of fast speed, good target protein recovery and high purity, and is compatible with subsequent analysis by mass spectrometry.
07:21
Twin-Screw Extrusion Process to Produce Renewable Fiberboards
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Cited by 14 •
2021
A versatile twin-screw extrusion process to provide an efficient thermo-mechano-chemical pretreatment on lignocellulosic biomass was developed, which leads to an increased average fiber aspect ratio. A natural binder can also be added continuously after fiber refining, leading to bio-based fiberboards with improved mechanical properties after hot pressing of the obtained extruded material.
FAQs
The comparison creates a contrast in genetic similarity while retaining a degree of shared family environment. Monozygotic pairs provide information from twins who share nearly all genetic material, whereas dizygotic pairs share about half on average. If concordance patterns differ between these groups, researchers can evaluate whether genetic susceptibility may contribute to the clinical outcome.
Shared environmental conditions can influence both members of a twin pair, potentially increasing similarity even when genetic factors are not the primary explanation. For that reason, researchers interpret concordance differences alongside the environments experienced by the twins. This consideration helps prevent environmental influences from being treated as evidence of inherited susceptibility alone.
A greater similarity in outcomes among monozygotic than dizygotic pairs can support a role for genetic susceptibility, while similar patterns across both groups may point toward shared environmental influence or other factors. These results do not by themselves identify a specific gene or exposure; they help estimate the relative contributions associated with a condition.
Many psychiatric, autoimmune, and cardiovascular disorders may reflect both inherited susceptibility and environmental exposure. Twin concordance data provide a way to examine these influences together rather than treating disease risk as exclusively genetic or environmental. This makes the approach valuable for building broader explanations of why related individuals can experience similar or different clinical outcomes.
Researchers first identify a trait, disease, or clinical outcome and determine how often it appears in both members of each twin pair. They then calculate concordance rates and compare results for monozygotic and dizygotic twins. Interpreting those rates in relation to shared environmental conditions supports estimates of genetic and environmental contributions.
The approach can be applied to questions about psychiatric, autoimmune, and cardiovascular disorders, as well as other clinical outcomes when suitable twin-pair data are available. Researchers can ask whether patterns of occurrence are more consistent with inherited susceptibility, shared exposure, or a combination. The resulting evidence helps refine disease-risk research.
These findings can improve understanding of how inherited and environmental influences contribute to disease risk. That understanding may help researchers develop more informed prevention strategies by considering environmental exposure alongside susceptibility. It can also support treatment research by clarifying the broader factors associated with a condition, without reducing clinical outcomes to genetics alone.