Suhail A. Doi

6 Questions 120 Answers 0 Followers

Questions related from Suhail A. Doi

Should we abandon stratification of meta-analyses by quality?

Our paper published in the Journal of Clinical Epidemiology clearly outlines why doing this is not just inaccurate but actually wrong because it introduces bias. This is regularly done and...

10 December 2018 9,757 5 View

Can we run more robust meta-analysis models using Stata?

Generally the answer is yes. The admetan package in Stata (part of the ipdmetan package) can now run Quality effects [1] and IVhet [2] meta-analyses. Both are replacements to the random effects...

09 June 2018 485 4 View

Is the random effects estimator worse than the fixed effect estimator under heterogeneity?

The two main properties of a meta-analytic estimator should be robustness (less error) and reliability (correct error estimation). The SAS code below proves that the random effects estimator fails...

11 June 2016 9,345 20 View

Can the GPM framework replace the Bayesian framework in network meta-analysis?

Attached are details of a new framework for meta-analysis that we created that is easy for the main-stream researcher to implement. In addition, it avoids many assumptions involved with the...

20 February 2016 2,933 3 View

Why is the fixed effect estimator not used for meta-analysis of heterogenous studies?

It is clear that as heterogeneity increases, the fixed effect estimator in meta-analysis has a lower true variance (and MSE) than the random effects estimator so why do statisticians (and...

28 October 2014 9,328 23 View

Why are some people with coronavirus asymptomatic?

Information on questions commonly asked Written by Saif Badran and Suhail A. Doi The attached file has hyperlinks Covid-19 is such a threat because it can kill healthy adults in addition to...

01 January 1970 2,328 9 View