Imports and cleans data from the youth survey, a pen-and-paper questionnaire completed by 10-15 year olds in participating households. Saves data on demographics, satisfaction items & the SDQ. Saves all observations from 15 waves as long-form dataset.

Basic cleaning of the data frame, exploration of data (outlier checks & distribution checks), creation of additional variables.

Using elastic net to predict score on CBCL attention problem scale from pre/perinatal data in ABCD cohort

Elastic net regression with cross-validation

R Markdown code & html output