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In clinical use, the CHADS 2 score has been superseded by the CHA 2 DS 2-VASc score, which gives a better stratification of low-risk patients. The CHADS 2 score has been outperformed by the CHA 2 DS 2-VASc in multiple patient groups including patients with AF who are receiving outpatient elective electrical cardioversion. [9]
A calculated HAS-BLED score is between 0 and 9 and based on seven parameters with a weighted value of 0-2. The HAS-BLED mnemonic stands for: Hypertension; Abnormal renal and liver function; Stroke; Bleeding; Labile INR; Elderly; Drugs or alcohol; A study comparing HEMORR2HAGES, ATRIA and HAS-BLED showed superior performance of the HAS-BLED ...
The negative predictive value is defined as: = + = where a "true negative" is the event that the test makes a negative prediction, and the subject has a negative result under the gold standard, and a "false negative" is the event that the test makes a negative prediction, and the subject has a positive result under the gold standard.
Here "T+" or "T−" denote that the result of the test is positive or negative, respectively. Likewise, " D +" or " D −" denote that the disease is present or absent, respectively. So "true positives" are those that test positive ( T +) and have the disease ( D +), and "false positives" are those that test positive ( T +) but do not have the ...
Pearson's correlation coefficient is the covariance of the two variables divided by the product of their standard deviations. The form of the definition involves a "product moment", that is, the mean (the first moment about the origin) of the product of the mean-adjusted random variables; hence the modifier product-moment in the name.
A correlation coefficient is a numerical measure of some type of linear correlation, meaning a statistical relationship between two variables. [a] The variables may be two columns of a given data set of observations, often called a sample, or two components of a multivariate random variable with a known distribution. [citation needed]
"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Leave it up to Cher to have even our favorite celebrities totally starstruck! ICYMI, Saturday Night ...
where Y is an N × N matrix the elements of which can be indexed using conventional matrix notation. In general the elements of the Y-parameter matrix are complex numbers and functions of frequency. For a one-port network, the Y-matrix reduces to a single element, being the ordinary admittance measured between the two terminals.