Quality Control in Clinical Trials
Quality Control in Clinical Trials
Quality Control in Clinical Trials
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2. Outlier test (Tukey)<br />
a. Rank data, divide <strong>in</strong>to percentiles<br />
(quartiles)<br />
b. Identify 25th, 75th percentiles,<br />
difference between them<br />
(<strong>in</strong>terquartile range)<br />
c. Def<strong>in</strong>e upper limit as 75th<br />
percentile plus <strong>in</strong>terquartile range<br />
d. Def<strong>in</strong>e lower limit as 25th percentile<br />
m<strong>in</strong>us <strong>in</strong>terquartile til range<br />
e. Reanalyze without outliers, report<br />
both
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