Questions tagged [standardized-mean-difference]
The standardized-mean-difference tag has no usage guidance.
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Formula for standardized mean difference in meta-analysis
I am reading the book: Terri D. Pigott. Advances in Meta-Analysis. Springer 2012. https://link.springer.com/book/10.1007/978-1-4614-2278-5
On page 10, there is a formula for standardized mean ...
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meta-analysis when the control value is taken from a standard (iso, en, etc...) and do has not any variance
I am starting to conduct a meta-analysis on the effect of different raw materials on pellets quality (for bioenergy purposes) I have already the database of studies and my idea initially was to ...
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How to calculate standard deviation for the difference between two means?
I am writing a paper where I am comparing the change over time of an intervention and control group. I have the mean and standard deviation for both groups at baseline and the mean and standard ...
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Mean difference (95% CI) between paired samples
I have some results from a study pre- and post-intervention. It's for an underpowered feasibility study, hence I am not performing formal hypothesis testing but I'd like to calculate mean difference (...
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Evaluating success of propensity score matching with single metric that accounts for both covariate balance and matching rate?
Propensity score matching techniques can be assessed and compared with covariate balance metrics like the standardized mean difference (SMD).
However, SMDs don't account for varying matching rates.
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Which standard deviation should I use to calculate standardised mean difference from mmrm mean difference?
I have data of an RCT study. It is a two arm study with 3 post-baseline time points. Based on the study design and study objectives, I have ran a MMRM on a continuous outcome variables. The model ...
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Is it possible to summarise standardized mean differences deriving from different variables in a meta-analysis?
I am conducting a meta-analysis on the alteration of fine roots in forest soil as a consequence of soil compaction after logging operations. I have already the database which is made up of studies ...
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Is it appropriate to use standardized mean differences (SMDs), and if so, how do you combine them?
I'm conducting a meta-analysis and trying to figure out the best way to determine the effectiveness of a particular treatment using results from multiple studies. As the studies vary in several ...
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Is there an acceptable range for the values of MDs and SMDs? If MDs go below and beyond -1 and 1, respectively, are my results still valid?
I'm not certain whether my subgroup meta-analyses that produced extreme(?) values of MD (highest is 13.86 [95%-CI, 12.44; 15.29] and lowest at -15.42 [95%-CI, -20.63; -10.20]) are still valid. I used ...
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What's the meaning of an increased SMD after inverse propensity weight matching?
I made an inverse propensity weight matching for my research project (two groups, treated and control) and after I observed for some covariates an increased standardized mean difference. What is its ...
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What is the meaning of a negative Standardized mean difference (SMD)?
The core of my question is: What is the meaning of a negative SMD?
To assess the balance after Propensity Score Matching (PSM) with the R package MatchIt the ...
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Converting effect size from linear and logistic regression
I want to calculate a same effect size from a linear regression and a logistic regression to be able to compare them. More specifically, I would like to calculate standardized mean-difference (SMD).
I ...
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Balance diagnostics: Why not measure post-matching balance **within** matched treatment-control pairs?
I understand there are a number of techniques for evaluating post-matching balance at the covariate level: standardized mean difference (SMD), variance ratios, and empirical CDF statistics.
Are there ...
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Meta regresssion with Standardized Mean Difference
I am doing a meta-analysis of studies comparing A and B. As some studies used different scales (measurement techniques), we have decided to pool all studies and used standardized mean difference (SMD)....
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How can I compute standardized mean differences (SMD) after propensity score adjustment?
Standardized mean differences (SMD) are a key balance diagnostic after propensity score matching (eg Zhang et al).
Their computation is indeed straightforward after matching. However, I am not plannig ...
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