Ehsan Karim

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163 videos

This channel is for learning or discussing various statistical, data science, and software basics. Statistical, causal inference, machine learning, survey da...

Latest Videos

high-dimensional propensity score (hdPS) in residual confounding control for admin data analysis

collapsibility example in epidemiological setting

Cross validation vs bootstrap

Advantage of backward elimination over forward selection in regression methods

interaction vs effect measure modification in observational epidemiological studies (wconfounding)

Reference for machine learning topics

Critical Appraisal of Published Articles using Machine Learning methods in clinical research

Model Development Considerations for Machine Learning Implementations in Clinical Applications

Unsupervised Learning K-means, Optimal number of clusters, choose different initial means (nstart)

Overview of supervised learning in machine learning

Prediction binary outcome, Measuring prediction error AUC Brier Score

Prediction continuous outcome, Design Matrix, Measure prediction error rmse r2, Overfit Optimism

RHC data description

Supervised Learning CART vs Ensemble method (bagging boosting Super Learner); Variable importance

Cross validation in machine learning k-fold, 1-by-1, automated caret package, performance measure

Data splitting in machine learning; test, train and performance measures

R Guide for TMLE in Medical Research (RMedicine Conference Short Course)

Lab 4h Supopulation in Complex Survey data (Subsetting)

Lab 4g Analyzing another the analytic dataset from NHANES

Lab 3d definition of collapsibility, and examples in RD, RR and OR marginal & conditional estimates

Lab3c problem with change-in-estimate method for odds ratios

presenting at a conference or a seminar

RStudio + @GitHub Manuscript Writing Collaboration Tools (Bookdown site + PDF via Rmarkdown)

Scientific writing Results Section

Scientific writing Discussion Section

Scientific writing Methods Section

Scientific writing Introduction Section

Scientific writing presenting findings via Tables and Figures

Different imputation methods in inferring per-protocol effects of sustained treatment strategies

RWCT Project Developing & Evaluating Causal Inference Methods for Pragmatic Trials