Rurality Modifies the Association Between Symptoms and the Diagnosis of Amyotrophic Lateral Sclerosis

This contains the code for the analysis in the pre-print. Also shared on Github

• build_cohort.qmd/html is a Quarto script for identifying ALS cases and controls.
• extract_covariates.qmd/html is a Quarto script used to extract covariates used in the analysis. Also builds the data sets used in the analysis.
• main_analysis.qmd/html is a Quarto script that includes the main analysis reported in the paper and also all the non-survival sensitivity analyses.
• age_at_als_dx.qmd/html is a Quarto script that includes the survival analyses.