Estimating the sample mean and standard deviation from the sample size, median, range and/or interquartile range

Wan, Xiang; Wang, Wenqian; Liu, Jiming; Tong, Tiejun

doi:10.1186/1471-2288-14-135

Public

Estimating the sample mean and standard deviation from the sample size, median, range and/or interquartile range

Published in BMC Medical Research Methodology • Dec 1, 2014

Authors:

Xiang Wan

Wenqian Wang

Jiming Liu

Abstract

BACKGROUND: In systematic reviews and meta-analysis, researchers often pool the results of the sample mean and standard deviation from a set of similar clinical trials. A number of the trials, however, reported the study using the median, the minimum and maximum values, and/or the first and third qu...

Subject

Standard deviation

Sample size determination

Statistics

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