Search Results for author: Torsten Hothorn

Found 12 papers, 6 papers with code

Deep conditional transformation models for survival analysis

no code implementations20 Oct 2022 Gabriele Campanella, Lucas Kook, Ida Häggström, Torsten Hothorn, Thomas J. Fuchs

An every increasing number of clinical trials features a time-to-event outcome and records non-tabular patient data, such as magnetic resonance imaging or text data in the form of electronic health records.

Survival Analysis

Heterogeneous Treatment Effect Estimation for Observational Data using Model-based Forests

no code implementations6 Oct 2022 Susanne Dandl, Andreas Bender, Torsten Hothorn

Most importantly, the noncollapsibility issue necessitates the joint estimation of treatment and prognostic effects.

What Makes Forest-Based Heterogeneous Treatment Effect Estimators Work?

2 code implementations21 Jun 2022 Susanne Dandl, Torsten Hothorn, Heidi Seibold, Erik Sverdrup, Stefan Wager, Achim Zeileis

A related approach, called "model-based forests", that is geared towards randomized trials and simultaneously captures effects of both prognostic and predictive variables, was introduced by Seibold, Zeileis and Hothorn (2018) along with a modular implementation in the R package model4you.

Deep interpretable ensembles

no code implementations25 May 2022 Lucas Kook, Andrea Götschi, Philipp FM Baumann, Torsten Hothorn, Beate Sick

We propose a novel transformation ensemble which aggregates probabilistic predictions with the guarantee to preserve interpretability and yield uniformly better predictions than the ensemble members on average.

Uncertainty Quantification

Deep and interpretable regression models for ordinal outcomes

1 code implementation16 Oct 2020 Lucas Kook, Lisa Herzog, Torsten Hothorn, Oliver Dürr, Beate Sick

We present ordinal neural network transformation models (ONTRAMs), which unite DL with classical ordinal regression approaches.

Image Classification regression

Deep Conditional Transformation Models

no code implementations15 Oct 2020 Philipp F. M. Baumann, Torsten Hothorn, David Rügamer

Learning the cumulative distribution function (CDF) of an outcome variable conditional on a set of features remains challenging, especially in high-dimensional settings.

Deep transformation models: Tackling complex regression problems with neural network based transformation models

2 code implementations1 Apr 2020 Beate Sick, Torsten Hothorn, Oliver Dürr

Deep learning is known for outstandingly accurate predictions on complex data but in regression tasks, it is predominantly used to just predict a single number.

regression

Survival Forests under Test: Impact of the Proportional Hazards Assumption on Prognostic and Predictive Forests for ALS Survival

1 code implementation5 Feb 2019 Natalia Korepanova, Heidi Seibold, Verena Steffen, Torsten Hothorn

We investigate the effect of the proportional hazards assumption on prognostic and predictive models of the survival time of patients suffering from amyotrophic lateral sclerosis (ALS).

Top-down Transformation Choice

1 code implementation26 Jun 2017 Torsten Hothorn

The models used in this analysis ranged from evergreens, such as the normal linear regression model with constant variance, to novel models with extremely flexible conditional distribution functions, such as transformation trees and transformation forests.

Transformation Forests

no code implementations9 Jan 2017 Torsten Hothorn, Achim Zeileis

A more general understanding of regression models as models for conditional distributions allows much broader inference from such models, for example the computation of prediction intervals.

Prediction Intervals regression

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