Conclusion - some  things may make driving worse, but you can't predict if it will make for riskier driver overall.

see https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5281661/

Journal of Neural Transmission

J Neural Transm (Vienna). 2017; 124(Suppl 1): 55–67.

Published online 2015 Sep 29. doi: 10.1007/s00702-015-1465-6

PMCID: PMC5281661

PMID: 26419597

Driving and attention deficit hyperactivity disorder

Anselm B. M. Fuermaier,#1 Lara Tucha,#1 Ben Lewis Evans,2 Janneke Koerts,1Dick de Waard,2 Karel Brookhuis,2 Steffen Aschenbrenner,3 Johannes Thome,4Klaus W. Lange,5 and Oliver Tucha1