Blog
RSS FeedPosted by Michael Wonder on 23 Mar 2022
Instrumental variables and heterogeneous treatment effects
22 March 2022 - A randomised clinical trial can be used to estimate the average treatment effect for a population. ...
Posted by Michael Wonder on 15 Mar 2022
Collider bias
14 March 2022 - Bias is a systematic, non-random error in the estimation of a treatment effect or the effect of ...
Posted by Michael Wonder on 02 Mar 2022
Assessing unexpected circumstances that lead to modifications in clinical trial design, conduct, or analysis application of the CONSERVE Reporting Guideline
1 March 2022 - In the COVID-19 Dexamethasone (CoDEX) randomised clinical trial, which studied a sample of critically ill patients with ...
Posted by Michael Wonder on 14 Dec 2021
Heterogeneity of treatment effect; estimating how the effects of interventions vary across individuals
14 December 2021 - ...
Posted by Michael Wonder on 23 Nov 2021
Use of confidence intervals in interpreting non-statistically significant results
23 November 2021 - The goal of much of medical research is to determine which of 2 or more therapeutic approaches ...
Posted by Michael Wonder on 23 Aug 2021
Estimands, estimators and estimates
23 August 2021 - The primary goal of most randomised clinical trials is to draw conclusions about the effect of a ...
Posted by Michael Wonder on 17 Feb 2021
Immortal time bias in observational studies
16 February 2021 - Observational studies are commonly used to evaluate the association between a risk factor or “exposure” and the ...
Posted by Michael Wonder on 14 Feb 2021
Why proper understanding of confidence intervals and statistical significance is important
15 February 2021 - Guidelines for reporting results from randomised trials have long underscored the importance of confidence intervals. ...
Posted by Michael Wonder on 02 Feb 2021
Is it time to stop using statistical significance?
1 February 2021 - The important first step in the critical appraisal of a randomised trial is not an evaluation ...
Posted by Michael Wonder on 09 Dec 2020
Even before year end, 2020's new drug approvals match FDA's 2019 stats
7 December 2020 - The US FDA has kept its new drug approvals for 2020 on track to match or ...
Posted by Michael Wonder on 28 Sep 2020
Worst-rank score methods—a non-parametric approach to informatively missing data
28 September 2020 - A previous JAMA Guide to Statistics and Methods article briefly reviewed non-parametric statistics. ...
Posted by Michael Wonder on 15 Sep 2020
Estimating risk ratios and risk differences: alternatives to odds ratios
15 September 2020 - The goal of many medical research studies is to estimate the direction and magnitude of the effect ...
Posted by Michael Wonder on 02 Jul 2020
Regression discontinuity design
2 July 2020 - The method is used to study the outcomes related to an abrupt change when it is not ...
Posted by Michael Wonder on 14 Mar 2020
Why test for proportional hazards?
13 March 2020 - The Cox proportional hazards model, introduced in 1972, has become the default approach for survival analysis in ...
Posted by Michael Wonder on 18 Nov 2019
Biostatistics: a fundamental discipline at the core of modern health data science
28 October 2019 - The value of our health and medical research investment is at risk unless we foster the discipline ...