Suhail A. Doi

9 Questions 159 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 9,799 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 538 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 9,405 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 2,986 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 9,374 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 2,377 9 View

Shall we abandon the idea of there being additive versus multiplicative effect modification in epidemiology?

I have discussed in an article that perhaps the time has come when we need to reconsider if there can be such a thing as additive versus multiplicative effect modification for binary outcomes....

01 January 1970 3,187 0 View

How long are you infectious for when you have coronavirus?

Information on commonly asked questions Written by Saif Badran and Suhail A. Doi Hyperlinks to content are in the attached file Respiratory droplets are mainly the route via which...

01 January 1970 3,891 6 View

Question: Statistical divergence instead of statistical significance

Please suggest if statistical "divergence" is the best term to replace statistical "significance" and for more details please see here: From Significance to Divergence: Guiding Statistical...

01 January 1970 8,664 100 View