Lai M, Kassee C, et al. The Lancet Psychiatry. Published: August 22, 2019DOI:https://doi.org/10.1016/S2215-0366(19)30289-5

This review of 96 studies identifies pooled prevalence estimates of 28% (95% CI 25–32) for attention-deficit hyperactivity disorder; 20% (17–23) for anxiety disorders; 13% (9–17) for sleep–wake disorders; 12% (10–15) for disruptive, impulse-control, and conduct disorders; 11% (9–13) for depressive disorders; 9% (7–10) for obsessive-compulsive disorder; 5% (3–6) for bipolar disorders; and 4% (3–5) for schizophrenia spectrum disorders in people with autism spectrum disorder (ASD).

https://www.sciencedirect.com/science/article/abs/pii/S2215036619302895