Comparison of Cox proportional hazards regression and generalized Cox regression models applied in dementia risk prediction

TitleComparison of Cox proportional hazards regression and generalized Cox regression models applied in dementia risk prediction
Publication TypeJournal Article
Year of Publication2020
AuthorsGoerdten, J, Carrière, I, Muniz-Terrera, G
JournalAlzheimer's & Dementia: Translational Research & Clinical Interventions
Volume6
Issue1
KeywordsCox proportional hazards regression, Dementia, dementia risk model, Prediction, splines
Abstract

Abstract Introduction The frequently used Cox regression applies two critical assumptions, which might not hold for all predictors. In this study, the results from a Cox regression model (CM) and a generalized Cox regression model (GCM) are compared. Methods Data are from the Survey of Health, Ageing and Retirement in Europe (SHARE), which includes approximately 140,000 individuals aged 50 or older followed over seven waves. CMs and GCMs are used to estimate dementia risk. The results are internally and externally validated. Results None of the predictors included in the analyses fulfilled the assumptions of Cox regression. Both models predict dementia moderately well (10-year risk: 0.737; 95% confidence interval [CI]: 0.699, 0.773; CM and 0.746; 95% CI: 0.710, 0.785; GCM). Discussion The GCM performs significantly better than the CM when comparing pseudo-R2 and the log-likelihood. GCMs enable researcher to test the assumptions used by Cox regression independently and relax these assumptions if necessary.

DOI10.1002/trc2.12041
Citation Key10884