discriminant function


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Related to discriminant function: linear discriminant function

dis·crim·i·nant func·tion

a particular combination of continuous variable test results designed to achieve separation of groups; for example, a single number representing a combination of weighted laboratory test results designed to discriminate between clinical classes.

discriminant function

Any algorithm or assessment tool to evaluate disease severity or guide clinical or administrative decisions in health care. In gastroenterology, e.g., a discriminant function is commonly used to gauge the severity of alcoholic hepatitis. It uses two variables, the patient's measured protime (PT) and total serum bilirubin level. The difference between the patient's PT and the control PT is multiplied by 4.6 and added to the bilirubin level. If the derived number is greater than 32, the patient may benefit from treatment with corticosteroids or pentoxifylline.
See also: function
References in periodicals archive ?
The discriminant function that emerged for the two groups of states for
Considering that the discriminant function is statistically insignificant and that we did not find even one single statistically significant difference between the cities, we can assume that a relatively narrow age range does not differentiate participants regarding their motivation to participate in physical activities.
The stepwise discriminant function analysis provided 24 statistically significant variables to separate the 10 groupings.
ik] is the raw scores of case i on discriminant function k.
After removal of the first function, the second combined (2 through 3) discriminant function was not statistically significant, [chi square](6) = 9.
Table 3 Mean rate and range of jackknife reclassification success, standard error of the mean (SE), null expectations, and predictor variables associated with 3 discriminant function analyses that examined otoliths from female southern flounder (Paralichthys lethostigma) collected in 1996 and in 2009-2012 in the South Atlantic (North Carolina, South Carolina, Georgia, and Florida) and the Gulf of Mexico (Florida, Alabama, Mississippi, Louisiana, and Texas) as part of state or federal agency sampling programs and from seafood dealers.
When data were analyzed separately in each season, only bill length contributed significantly to the discriminant function in both.
It can be inferred from this, that the discriminant function should be comprised of three variables.
Discriminant function analysis (DFA) was used to investigate the ability to classify larval clams from different hatcheries based on their multivariate Me:Ca ratios.
In the case of males (Table 5), the analysis shows that morphometric characters correlated with the first discriminant function are total length, length of cercopod, width of second abdominal segment and abdominal length.
Using discriminant function analysis and analysis of variance, the study showed that there were few differences between men who commit sexual assault when sober or drinking.
the linear discriminant function (Fisher, 1936) and the quadratic discriminant function (Smith, 1947), when the conditions for optimality of these parametric methods are violated.