R markdown code associated with "An Observational Study on Effects of Contact, Collision, and Non-Contact Sports Participation on Cognitive and Emotional Health"

This is R markdown code associated with the statistical analysis for "An Observational Study on Effects of Contact, Collision, and Non-Contact Sports Participation on Cognitive and Emotional Health." The authors of the manuscript that is based off of the results of the R code are: Hannah A. Jin;1,2 William Bekerman;1 Dylan S. Small, PhD;1 Amanda Rabinowitz, PhD3 Affiliations: 1 Department of Statistics and Data Science, The Wharton School, University of Pennsylvania, Philadelphia, PA 19104-1686) 2 Present address: Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA 02115 3 Moss Rehabilitation Research Institute, Elkins Park, PA 19027 A protocol for this study was previously posted. The citation for the protocol appears below: Jin HA, Bekerman W, Small DS, Rabinowitz A. Protocol for an observational study on effects of contact, collision, and non-contact sports participation on cognitive and emotional health. Zenodo. 2023 July 29. Available online: https://doi.org/10.5281/zenodo.8192804 The code was run in this order: first run 'ABCD_FINAL FOR PROTOCOL.Rmd' and then run 'ABCD_final_code_16hours_v2.Rmd'