Modeling Semicontinuous Longitudinal Expenditures: A Practical Guide

Seminar Series

Friday, July 12, 2019 - 01:30
Hock Plaza 11110
Berd Core Seminars

Abstract: One‐part models, uncorrelated two‐part models, correlated conditional two‐part (CTP) models, and correlated marginalized two‐part (MTP) models have been proposed for longitudinal expenditures that often exhibit a large proportion of zeros and a distribution of continuous, highly right‐skewed positive values. Guidance on implementing and interpreting each of these model is illustrated with an example of longitudinal (2000–2003) specialty care expenditures of veterans with hypertension, drawn from Veterans Administration data.  We provide a "roadmap" for when to use which approach, and describe commonly found modeling complications and how to overcome them.

Maren Olsen, PhD
Associate Professor of Biostatistics and Bioinformatics


Valerie Smith, DrPH
Assistant Professor in Population Health Sciences