{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/survival-forests-under-test-impact-of-the","title":"Survival Forests under Test: Impact of the Proportional Hazards Assumption on Prognostic and Predictive Forests for ALS Survival","arxiv_id":"1902.01587","date":"2019-02-05","proceeding":null,"authors":["Natalia Korepanova","Heidi Seibold","Verena Steffen","Torsten Hothorn"],"abstract":"We investigate the effect of the proportional hazards assumption on\nprognostic and predictive models of the survival time of patients suffering\nfrom amyotrophic lateral sclerosis (ALS). We theoretically compare the\nunderlying model formulations of several variants of survival forests and\nimplementations thereof, including random forests for survival, conditional\ninference forests, Ranger, and survival forests with $L_1$ splitting, with two\nnovel variants, namely distributional and transformation survival forests.\nTheoretical considerations explain the low power of log-rank-based splitting in\ndetecting patterns in non-proportional hazards situations in survival trees and\ncorresponding forests. This limitation can potentially be overcome by the\nalternative split procedures suggested herein. We empirically investigated this\neffect using simulation experiments and a re-analysis of the PRO-ACT database\nof ALS survival, giving special emphasis to both prognostic and predictive\nmodels.","url_abs":"http://arxiv.org/abs/1902.01587v1","url_pdf":"http://arxiv.org/pdf/1902.01587v1.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"abstracts"},"code_links":[{"paper_slug":"survival-forests-under-test-impact-of-the","repo_url":"https://github.com/r-forge/ctm","is_official":1,"mentioned_in_paper":0,"mentioned_in_github":0,"framework":"none","reach":{"status":"ok"}}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"syntology_url":null,"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}