What is concordance analysis?
Concordance analysis is needed to establish the validity of a new diagnostic measuring or rating technique or to demonstrate the near-equivalence of multiple measuring or rating techniques. Erroneous approaches to concordance analysis can lead to false conclusions.
What is concordance data?
A concordance, in statistical terms, is a product that allows a user to convert data from one geographical region (under which data have been collected) to a new geographical region.
How is concordance calculated?
The concordance rate is the number of subjects that are concordant over the total number of subjects assessed. As can be seen in Figure 1, the concordance rate is calculated by adding the diagonal counts and dividing by the total number of subjects assessed.
What is a concordance used for?
A Bible concordance is a concordance, or verbal index, to the Bible. A simple form lists Biblical words alphabetically, with indications to enable the inquirer to find the passages of the Bible where the words occur.
Whats the definition of concordance?
Definition of concordance 1 : an alphabetical index of the principal words in a book or the works of an author with their immediate contexts. 2 : concord, agreement.
What is concordance in survival analysis?
Concordance, or synonymously the C-statistic, is a valuable measure of model discrimination in analyses involving survival time data. Generally it is defined based upon baseline covariates and with only limited consideration of ties.
What is concordance in classification?
If the direction of classifications is the same, the pairs are concordant. For example, both X and Y rate item 1 higher than item 2. If the direction of the classification is not the same, the pair is discordant. For example, X rates item 1 higher than item 2 but Y rates item 1 lower than item 2.
What is another word for concordance?
In this page you can discover 14 synonyms, antonyms, idiomatic expressions, and related words for concordance, like: meeting of the minds, accord, agreement, concurrence, consonance, rapport, agree, concord, harmony, unity and dictionary.
What are concordant values?
Concordant readings are frequently encountered in titrations in chemistry, where titre values are said to be concordant if they are within 0.20 cm3 of each other. Control variable: A control variable is one that will affect the outcome of the investigation.
What makes results concordant?
The expression “concordant titers” refers to the volume of two or more titres that are similar in quantity (less than a 0.10 mL difference between each other). We can ignore the rough titration result. The results of titration 1,3, and 4 are concordant. Titration 2 is too high.
What is model concordance?
Abstract The concordance statistic is used to measure the amount of agreement between two variables, often a risk score and time until an event in survival analysis. Surprisingly, the concordance statistic is a score statistic from a Cox model with a time varying coefficient.
What is the concordance index?
The concordance index (CI), which quantifies the quality of rankings, is the standard performance measure for model assessment in survival analysis. In contrast, the standard approach to learning the popular proportional hazard (PH) model is based on Cox’s partial likelihood.
Why are concordant results used?
Reliability: The results of an investigation may be considered reliable if readings are repeated, and concordant data is obtained. The more concordant your results are, the more reliable they are likely to be.
What does concordance mean in logistic regression?
The concordance statistic is equal to the area under a ROC curve. The C-statistic (sometimes called the “concordance” statistic or C-index) is a measure of goodness of fit for binary outcomes in a logistic regression model.
What is the meaning of a concordance?
What is the function of concordance?
Concordance programs have been used in literary and mostly religious text analysis for decades. They aim to count and define the frequency and function of a word or word groups in a given text. The aim is to give an inductive understanding of the word/structure and its use in authentic texts.
What is a concordant value?
Concordant reading refers to the same value each time the titration is performed with same solutions. for example if your observation are as follow:- 22.1 22.2 22.3 22.3 22.3 Then, In this case, three concordant reading would be 22.3. 2nd part:- Concordant readings are the ones that are accounted for errors. Regards.
What is the use of concordance?
What’s the use of concordance?
The concordance is used to find examples of a word, lemma, phrase, tag or even a complex grammatical or lexical structure.
What is a concordance index?
The concordance index or c-index is a metric to evaluate the predictions made by an algorithm. It is defined as the proportion of concordant pairs divided by the total number of possible evaluation pairs.
What is concordance?
Concordance (genetics), the presence of the same trait in both members of a pair of twins (or set of individuals) Concordance (medicine), involvement of patients in decision-making to improve patient compliance with medical advice Concordance system, in Swiss politics, the presence of all major parties in the Federal Council
What is a concordance correlation coefficient?
Concordance correlation coefficient, in statistics, a measurement of the agreement between two variables Concordance database, a database tailored to legal applications and distributed by LexisNexis
What is the concordance of a DNA sample?
Samples from the same individual or identical twins theoretically have a concordance of 100%, but due to assaying errors and somatic mutations, they are usually found in the range of 99% to 99.95%. Concordance can therefore be used as a method of assessing the accuracy of a genotyping assay platform.
What is the concordance rate of a given characteristic?
If a characteristic identified in one twin is caused by a certain gene, then it would also very likely be present in the other twin. Thus, the concordance rate of a given characteristic helps suggest whether or to what extent a characteristic is related to genetics.