The signs and symptoms of<unk> s vary based on the age of the persons suffering from them, the actual type of<unk><unk>  that they are struggling with, the environment in which they are living, and whether they are male or female. Co-morbidity Complications of late Parkinson's disease may include a range of<unk> s, including eating, buying, compulsive gambling, sexual behavior, and related behaviors (punding, hobbyism and walkabout). Prevalence studies suggest that<unk> s occur in 13.6–36.0% of Parkinson's patients exhibited at least one form of<unk> . There is a significant co-occurrence of pathological gambling and personality disorder, and is suggested to be caused partly by their common "genetic vulnerability". The degree of heritability to<unk>  is similar to other psychiatric disorders including substance use disorder. There has also been found a genetic factor to the development of<unk>  just as there is for substance use disorder. The risk for subclinical PG in a population is accounted for by the risk of alcohol dependence by about 12–20% genetic and 3–8% environmental factors. There is a high rate of co-morbidity between ADHD and other<unk> s.
Impulse-control disorder
Episodic dyscontrol syndrome
Frontal lobe disorder
Tic disorder
Motivational deficiency disorder
Adult attention deficit hyperactivity disorder
Nightmare disorder
Psychoorganic syndrome