Standard Deviation from Confidence Interval

Computes the standard deviation from a CI around one group mean and sample size. This method is valid only for single groups and assumes the confidence interval is symmetric around the mean. For two groups, use SDp_from_CIp only when the CI is around a raw mean difference from two independent groups. Small samples should generally use the t distribution ( t_dist = TRUE ).

Lower limit confidence interval
Upper limit confidence interval
Sample size
Significance level
Whether a two sided test for significance was used
Whether a t-distribution has been used to calculate the CI. See description.
Within Study Result

Result

Function References

Cochrane Handbook

How to Cite

Emprechtinger, R., Schwarzer, G., Tölch, U., Schreder, G., & Gartlehner, G. (2025). Assessing the effectiveness of metaHelper: A randomized controlled trial of a web application and R package to streamline statistical transformations in meta-analysis. Journal of Clinical Epidemiology, 179, 111640. https://doi.org/10.1016/j.jclinepi.2024.111640

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