Standard Deviation from Confidence Interval

Computes the standard deviation from the confidence interval and sample size. This method is valid only for single groups and assumes the confidence interval is symmetrical around the mean. For two groups (e.g., intervention effects), use SDp_from_CIp . For sample sizes smaller than 60, the t-distribution (parameter "t-dist") is typically used to calculate the confidence interval.

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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