Wouter van Amsterdam
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Posts
General Chair’s notes on Machine Learning for Healthcare 2026
machine learning
healthcare
MLHC
The eleventh Machine Learning for Healthcare Conference (MLHC 2026) brought over 250 attendees to Johns Hopkins University for another year of work at the intersection of…
Sep 8, 2026
Wouter van Amsterdam, Rahul G. Krishnan
Flipping the sign of hazard ratios
r
survival analysis
causal inference
Hazard ratios are problematic summary measures for survival analysis
(Dumas and Stensrud 2025; Post et al. 2024; Stensrud et al. 2019; Aalen et al. 2015)
; even in…
Jul 4, 2025
Wouter van Amsterdam
What is stronger evidence of prediction model robustness?
statistics
prediction
causal inference
We’re evaluating a prediction model
\(f\)
that takes features
\(X\)
to predict binary outcome
\(Y\)
. We’d like the model to be
robust
, meaning that it’s predictive…
Apr 25, 2025
Wouter van Amsterdam
Is the JAMA opening up their language for causal effects?
causal inference
Randomized controlled trials (RCTs) measure the
causal effect
of interventions, but results from observational studies should be interpreted as mere
associations
, right? In…
Jun 7, 2024
Wouter van Amsterdam
Partial residual plots with multiply imputed data
r
linear regression
data visualization
In an earlier blog post I show how to plot the dependence of a response variable on covariate, both conditional on other covariates with a partial residual plot In this post…
Mar 22, 2024
Wouter van Amsterdam
The need for speed, performing simulation studies in R, JAX and Julia
r
julia
jax
python
simulation studies
Simulation experiments are important when evaluating methods but also for applied work in for example power analyses
(e.g. Amsterdam, Harlianto, et al. 2022)
or sensitivity…
Mar 8, 2024
Wouter van Amsterdam
The difference between intervention and counterfactuals
causal inference
statistics
Sometimes there is confusion about the difference between counterfactual predictions and interventional predictions. According to the ladder of causation introduced by Pearl…
Jul 25, 2021
Wouter van Amsterdam
When good predictions lead to bad decisions
causal inference
predictions
A common premise in prediction research for clinical outcomes is that better predictions lead to better (informed) decisions. This causal statement, that the intervention of…
Jul 20, 2021
Wouter van Amsterdam
Finding the functional form for multiple linear regression
statistics
simulations
linear regression
A frequent question that comes up when modeling continuous outcomes with multiple linear regression is what the correct functional form for the relationship between the…
Aug 16, 2019
Wouter van Amsterdam
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