interquartile range


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interquartile range

(ˌɪntəˈkwɔːtaɪl)
n
(Statistics) statistics the difference between the value of a variable below which lie 25 per cent of the population, and that below which lie 75 per cent: a measure of the spread of the distribution
References in periodicals archive ?
Numerical data and variables with distorted distribution were expressed by median as a measure of central value and interquartile range, while [chi square]-test contingency was used to analyze differentiation in the frequency of the parameters analyzed.
11) It also presents the interquartile range of these rates across our full sample (that is, the range from the 25th percentile to the 75th percentile, or middle 50 percent of the data set) since 1975.
All data are reported as median, range, and interquartile range (IQR) unless otherwise specified.
082 SD: standard deviation; IR: interquartile range (*) : lower than that of healthy controls (**) : higher than that of healthy controls
Variability was assessed using an interquartile range expressed as box and whisker plots.
As shown in Table 2, the regression models estimated that each interquartile range (4.
59 Abbreviations: ACS = American Community Survey; GPS = Global Positioning System; IQR = interquartile range.
Mean SD and Median with interquartile range was given for Johnsen scoring.
Natriuretic peptide levels were similar in patients with normal diastolic function (n=16; NT-proBNP: median, 168 pmol/L; interquartile range, 118 to 289 pmol/L), an impaired relaxation pattern (n=24; NT-proBNP: median, 269 pmol/L; interquartile range, 164 to 778 pmol/L) or a pseudonormal pattern (n=5; NT-proBNP: median, 846 pmol/L; interquartile range, 398 to 2867 pmol/L).
Descriptive statistics were performed and mean and standard deviations were used to summarize normally distributed data, whereas the median and interquartile range were reported for non-normally distributed variables.