Rheumazentrum Ruhrgebiet

Obesity is more strongly associated with physical performance and body composition than sarcopenia in patients with spondyloarthritis

Abstract Objectives Integrated data on body composition, objective physical performance and daily physical activity are limited in spondyloarthritis (SpA). The objective of this study is to describe DXA-derived body composition phenotypes and examine their cross-sectional associa...

Conclusions from an integral equation about the prevalence-odds in the illness-death model for chronic diseases

This research note explores the mathematical structure of the prevalence-odds integral equation for chronic disease dynamics recently formulated by Saem and Brinks (2024). We provide a rigorous derivation of the Brunet- Struchiner partial differential equation from the integral r...