Testing
As more research is conducted to improve testing methodologies for endothelial dysfunction, however, several non-invasive tests have been created by various medical-research companies.
However, there is a serious flaw in measurements of endothelial function which involve the percentage change in diameter as the selected statistic. There is a negative correlation between percent flow mediated dilation and baseline artery size, but this has only recently been recognised as a fundamental scaling problem, showing that peak diameter does not change as a constant proportion of baseline diameter. This dependence of percent FMD on baseline diameter can lead to biased estimates of endothelial function. For reseaerch on flow-medaited dilation an ANCOVA approach to adjusting FMD for variation in baseline diameter is more appropriate.
Read more about this topic: Endothelial Dysfunction
Famous quotes containing the word testing:
“No testing has overtaken you that is not common to everyone. God is faithful, and he will not let you be tested beyond your strength, but with the testing he will also provide the way out so that you may be able to endure it.”
—Bible: New Testament, 1 Corinthians 10:13.
“Traditional scientific method has always been at the very best 20-20 hindsight. It’s good for seeing where you’ve been. It’s good for testing the truth of what you think you know, but it can’t tell you where you ought to go.”
—Robert M. Pirsig (b. 1928)
“Today so much rebellion is aimless and demoralizing precisely because children have no values to challenge. Teenage rebellion is a testing process in which young people try out various values in order to make them their own. But during those years of trial, error, embarrassment, a child needs family standards to fall back on, reliable habits of thought and feeling that provide security and protection.”
—Neil Kurshan (20th century)