# variable

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Related to Binary variable: Continuous variable

## variable

[var´e-ah-b'l]
something that changes; an attribute or property of a person, event, or object that is known to vary in a given study.
dependent variable in a mathematical equation or relationship between two or more variables, a variable whose value depends on those of others; it represents a response, behavior, or outcome that the researcher wishes to predict or explain.
extraneous variable a factor that is not itself under study but affects the measurement of the study variables or the examination of their relationships.
independent variable in a mathematical equation or relationship between two or more variables, any variable whose value determines that of others; it represents the treatment or experimental variable that is manipulated by the researcher to create an effect on the dependent variable.

## var·i·a·ble

(var'ē-ă-bĕl),
1. That which is inconstant, which can or does change, as contrasted with a constant.
2. Deviating from the type in structure, form, physiology, or behavior.
[L. vario, to vary, change, differ]

## variable

(vâr′ē-ə-bəl, văr′-)
1.
a. Likely to change or vary; subject to variation; changeable.
b. Inconstant; fickle.
2. Biology Tending to exhibit genetic variation or variation in a physical trait: geographically variable color patterns.
3. Mathematics Having no fixed quantitative value.
n.
Something that varies or is prone to variation.

var′i·a·ble·ness n.

## variable

(1) Any attribute, phenomenon or event that can have different qualitative or quantitative values. Typically, a form of metadata goes with the variable, there is a variable definition that describes what is varying and there is a value for the variable. Variables are typically assessed in a clinical trial.
(2) In Study Data Tabulation Model (SDTM), variables describe observations with roles that determine the type of information conveyed by the variable about each observation and how it can be used.

In SDTM, variables include specific subtypes used in clinical research: "study variable" in trial design refers to a variable to be captured on the case record form (CRF); an "assessment" is a study variable pertaining to the status of a subject/patient, is usually measured at a certain time and is usually not compounded significantly by combining several simultaneous measurements to form a derived assessment (e.g., BMI, or a result of statistical analysis); an "endpoint" is a variable that pertains to the trial objectives.

## variable

noun Epidemiology Any characteristic or attribute that can be measured. See Confounding variable, Continuous variable, Dependent variable, Independent variable, Instrumental variable, Intervening variable, Lurking variable, Natural variable, Predictor variable, Qualitative variable, Quantitative variable, Random variable.

## var·i·a·ble

(var'ē-ă-bĕl)
1. That which is inconstant, which can or does change, as contrasted with a constant.
2. Deviating from the type in structure, form, physiology, or behavior.
[L. vario, to vary, change, differ]

## var·i·a·ble

(var'ē-ă-bĕl)
That which is inconstant, which can or does change, as contrasted with a constant.
[L. vario, to vary, change, differ]
References in periodicals archive ?
To properly model the timeline of the construction process, we introduce two additional binary variables, [S.sub.a,m] and [E.sub.a,m].
Hedging Strategies This table reports the estimates of probit models where the dependent variables are binary variables for the use of a certain hedging strategy.
[u.sup.t.sub.i]: Binary variable denoting the on/off schedule of generator i during period t
In their On/Off formulations, on the other hand, only one type of binary variables has been used, representing whether, in an event, an activity starts or is still in-process.
In examining involuntary part-time work, we include a series of binary variables representing the following educational categories: less than high school diploma; high school diploma or GED (general equivalency diploma); some college, no degree; associate's degree; and bachelor's degree or higher (including graduate or professional degree).
The coefficient of 0.09 on the post-sanction binary variable indicates that after the enforcement action, banks offer their borrowers loans with a 9.7 percent longer maturity (3.7 months) than before sanction, implying that longer maturity may help address bank reputational and condition problems arising from the enforcement action.
Binary variable results for the number of games started are presented in Table 3.
First, rather than using "total bribes" as an instrument (as in columns 1 and 3 of Table 6), a binary variable called "Any Bribes" is created that equals one if the firm was bribed at least once.
For the entrepreneurs, we use gender, defined as a binary variable equal to 1 if the entrepreneur is male and 0 if female.
A kind of model global checking, when besides an explanation numerical variable we reach one or several binary variables, can run the stages of test F, case when [F.sub.computed] results from:
In this equation, [C.sub.k,j] is the time of end of processing, by resource j, of the task occupying position k in the sequence; N is the number of tasks; [X.sub.s,k] is the binary variable, and T[P.sub.s,j] is the time for processing task i at resource j.

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