Youssef Soliman

6 Questions 4 Answers 0 Followers

Questions related from Youssef Soliman

Can we perform a MANCOVA for paired data?

I have data for a cross-over randomized controlled trial. I wonder if I can use MANCOVA to compare my outcomes (they are continuous) while having paired data. If I can't, what would be an...

21 November 2023 9,551 4 View

How to run mediation analysis after multiple imputation in R?

I have run a multiple imputation model and after it I used the with() and pool() functions to pool all my results using linear regression to get one estimate. I want to run mediation analysis on...

14 October 2023 9,098 1 View

How to calculate sample size for independent t-test given hedges g?

I need to calculate sample size based on this equation but I am give hedges g instead of cohen D: pwr.t.test(d = , sig.level= , power = , type = c("two.sample")) • d=effect size •...

01 September 2023 543 3 View

How to interpret ROC curve in the context of logistic regression?

Hello, I recently stumbled on a paper in the field of neurosurgery. The paper analyzes imaging parameters that predict injury related to the spinal cord (Posterior Ligamentous Complex Injuries)....

18 May 2023 7,360 1 View

How to interpret non-significant interventions ranking first in P-score ranking in network meta-analysis?

Hello, We are currently conducting a network meta-analysis of RCTs using R (netmeta package). I have relatively small number of studies. The problem is interventions that are non-significant but...

01 May 2023 9,962 1 View

Is it okay to add median and IQR = zero in a study?

Hello, I have a data of a retrospective study and one of the variables is the measurement of HIV viral load in patients. The data is not normally distributed according to Shapiro–Wilk test of...

04 May 2022 5,004 1 View