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Hi !!!! I want to do an analysis of continuous measures with 2 treatments, but these are reported as means (IQR) in all studies. How should I do the analysis. THANK'S ML [[alternative HTML version deleted]]

Hi, my name is martin lobo. I?m cardiologist from argentina. I would like to ask you a question. I am wanting to do a meta analysis with the meta and metafor packages in R. I have not managed to...

Hello everyone. I have a perhaps recurring query. I am analyzing the amount of fat in an organ, the problem is that this amount is reported with different methods (tomography, ultrasound, etc.) and the units are different. There are units...

Hi every body. I want to do a meta-analysis of continuous data, comparing the percentage of change in the level of lipids, of a treatment vs placebo. The % of change is made based on least squares mean (SE) baseline...

Hello, I have generally seen that a p <0.1 should be used to consider skewness in these tests. Is this so? Is this to reduce type I error? Thank you Lorenzo Mart?n Lobo MTSAC, FACC, FESC Especialista Jerarquizado...

Hi every one, as I can see if any of the studies particularly influenced the high level of heterogeneity. I did the sensitivity analysis with meteinf but I don't know how to find this point. Thank you Lorenzo Mart...

Hi everyones Several times it happens that we do not have the measure we need or its dispersion. for example: median (inter quartile range) median (confidence interval) or we have mean (standard deviation) pre test and post test, but we...

Hi, I am performing a meta analysis with metaprop, wanting to graph the sensitivity with metainf, even though I add comb.fixed = F, it does not give the random effect in other types of meta analysis it works well, as...

Effect Size Measures for Pretest Posttest Control Group Designs datT <- escalc(measure="SMCR", m1i=m_post, m2i=m_pre, sd1i=sd_pre, ni=ni, ri=ri, data=datT) datC <- escalc(measure="SMCR", m1i=m_post, m2i=m_pre, sd1i=sd...

Hi every one, I have a doubt with the subgroup analysis. in some cases the heterogeneity of each group is different, being able to use a fixed effect model and in other occasions one of random effects. Can this be...

Hi, I need to modify the names of the columns of a forest plot made from a metaprop object. I have managed to modify the first 3 columns by leftcols=c("studlab", "event", "n") y leftlabs=c("XXXX","XXXXX", "XXXXX...

Hi everyone !!! I need performed a meta-analisys, but i have a problem whith de data extractions. In 3 papers I have: event.e, n.e, event.c, n.c (or ai=tpos, bi=tneg, ci=cpos, di=cneg) In...

thanks wolfgang, the problem is that I don't get the correlation coefficients. Would it be valid to perform the meta-analysis with the post-treatment values ??and perform a meta-regression using the pre-treatment value as a covariate...

Dear Guido, thank you so much for your answer. I already downloaded the article to have it among my methodological appointments. On the other hand, when I look at the funnel plot, if there seems to be a certain asymmetry...

Thank you very much !! Do you know any method to impute the standard deviation of a difference of means (that is, I have the mean 1 with its deviation and the mean 2 with its deviation, I need to estimate...

Hello everyone. I'm Martin from Argentina. I am wanting to do a meta-analysis of the difference in means, baseline-final CRP drug vs pacebo. The problem is that complete data is not reported in most studies. Especially the...

Thank's Wolfgang. The bubble function of the target package only graphs the first variable and does not allow adding the adjustment line of the multivariate model. I don't know if it explains well to me, I need to...

and then the difference of standardized means when it would be used, I didn't think it was for these cases, greetings. Lorenzo Mart?n Lobo MTSAC, FACC, FESC Especialista Jerarquizado en Cardiolog?a Jefe de Dpto Enf. Cardiovasculares y...

Hello every one. I want to analyze studies with a technique evaluating successes and failures. the same technique is always used, but with two different protocols. I can do a meta analysis of a global and stratified arm by group...

Thank's Nicky. Regardless of what you mention, could I do the analysis of observational studies and rct together, in this particular case? Regards Lorenzo Mart?n Lobo MTSAC, FACC, FESC Especialista Jerarquizado en Cardiolog?a Jefe de Dpto Enf...