Many so-called Internet addicts do not suffer from the same damage to health and relationships that are common to established addictions.[36] High comorbidity: Internet addiction is often accompanied by other psychiatric disorders such as personality disorder and intellectual disability.[26][37][38][39][40] It is found that Internet addiction is accompanied by other DSM-IV diagnosis 86% of the time.[41] In one study conducted in South Korea, 30% of the identified Internet addicts have accompanying symptoms such as anxiety or depression and another 30% have a second disorder such as attention deficit hyperactivity disorder (ADHD).[42] Another study in South Korea found an average of 1.5 other diagnoses among adolescent internet addicts.[41] Further, it is noted in the United States that many patients only resort to medical help when experiencing difficulties they attribute to other disorders.[26][41] For many individuals, overuse or inappropriate use of the Internet is a manifestation of their depression, social anxiety disorders, impulse control disorders, or pathological gambling.[43] It generally remains unclear from existing literature whether other psychiatric disorders is the cause or manifest of Internet addiction.