Regresi Logistik Biner, Multinomial, Ordinal & Poisson

This tutorial introduces the analytic estimation option in the userGWAS function from the GenomicSEM package. The analytic estimator uses a closed-form Generalized Least Squares (GLS) approach to perform multivariate GWAS, reducing run times by over 800 times compared to the standard iterative estimator while producing equivalent results. The tutorial covers installation, function arguments, model specification requirements, and a fully worked example using a 5-factor model of common psychiatric disorders across 13 phenotypes. Note that this feature is currently in alpha and under active development — results should be cross-validated against the iterative estimator before drawing scientific conclusions. Link to preprint: https://www.biorxiv.org/content/10.64898/2026.06.03.729606v1