Groups with cannabis use had higher severity. ADHD features were similar in all groups. The assessment of ADHD and comorbid disorders is important. https://journals.sagepub.com/doi/full/10.1177/1087054719875787 https://psiquiatria.com/tdah-hiperactividad/diferencias-de-severidad-de-adiccion-y-comorbilidad-psiquiatrica-en-pacientes-con-tdah-que-buscan-tratamiento-para-trastornos-por-consumo-de-cannabis-o-cocaina/