SMD_from_mean

Calculates the SMD. It needs to be provided with the pooled standard deviation. If the pooled standard deviation is not available <code>SMD_from_group()</code> provides a direct method to calculate the SMD and also offers different forms like Hedges' g or Cohen's d.

Helps calculate statistical values commonly used in meta-analysis. It provides several methods to compute different forms of standardized mean differences, as well as other values such as standard errors and standard deviations.
The methods used in this package are described in the following references:
Altman D G, Bland J M. (2011) <doi:10.1136/bmj.d2090>
Borenstein, M., Hedges, L.V., Higgins, J.P.T. and Rothstein, H.R. (2009) <doi:10.1002/9780470743386.ch4>
Chinn S. (2000) <doi:10.1002/1097-0258(20001130)19:22%3C3127::aid-sim784%3E3.0.co;2-m>
Cochrane Handbook (2011) <https://handbook-5-1.cochrane.org/front_page.htm>
Cooper, H., Hedges, L. V., & Valentine, J. C. (2009) <https://psycnet.apa.org/record/2009-05060-000>
Cohen, J. (1977) <https://psycnet.apa.org/record/1987-98267-000>
Ellis, P.D. (2009) <https://www.psychometrica.de/effect_size.html>
Goulet-Pelletier, J.-C., & Cousineau, D. (2018) <doi:10.20982/tqmp.14.4.p242>
Hedges, L. V. (1981) <doi:10.2307/1164588>
Hedges L. V., Olkin I. (1985) <doi:10.1016/C2009-0-03396-0>
Murad M H, Wang Z, Zhu Y, Saadi S, Chu H, Lin L et al. (2023) <doi:10.1136/bmj-2022-073141>
Mayer M (2023) <https://search.r-project.org/CRAN/refmans/confintr/html/ci_proportion.html>
Stackoverflow (2014) <https://stats.stackexchange.com/questions/82720/confidence-interval-around-binomial-estimate-of-0-or-1>
Stackoverflow (2018) <https://stats.stackexchange.com/q/338043>.

Robert Emprechtinger

metaHelper

Transforms Statistical Measures Commonly Used for Meta-Analysis

Guido Schwarzer

Ulf Tölch

Günther Schreder

Gerald Gartlehner

SMD_from_mean function

<dl><dt>M1</dt>
<dd>treatment effect size group 1</dd>
<dt>M2</dt>
<dd>treatment effect size group 2</dd>
<dt>SD_pooled</dt>
<dd>the pooled standard deviation or the standard deviation of the control group in case Glass's delta should be calculated</dd></dl>

Arguments

Standardized Mean Difference (SMD) from Means and Pooled Standard Deviation — SMD_from_mean

<dl>

<dt>M1</dt>
<dd>treatment effect size group 1</dd>


<dt>M2</dt>
<dd>treatment effect size group 2</dd>


<dt>SD_pooled</dt>
<dd>the pooled standard deviation or the standard deviation of the control group in case Glass's delta should be calculated</dd>

</dl>

SMD_from_mean: Standardized Mean Difference (SMD) from Means and Pooled Standard Deviation

Description

Usage

Value

Arguments

Details

References

Examples