Mixed-Effects Models — Orthodont Case

Linear mixed-effects model of craniofacial growth on the classic Orthodont dataset, for the MCD - Estadística Aplicada course at Pontificia Universidad Católica de Chile.

Course: MCD - Estadística Aplicada, Pontificia Universidad Católica de Chile Author: Katherin Molina

Open report — English (PDF) Open report — Spanish (PDF)

Linear mixed-effects models of craniofacial growth in 27 children followed from ages 8 to 14. Finds a significant sexual dimorphism in growth rate, with boys growing 63.6% faster than girls, and substantial between-subject heterogeneity in both baseline measurements and growth rates.