A Study to Learn About the Occurrence of ADHD in Adults With Mental Conditions and Their Quality of Life

Participation Requirements

• Sex:

  ALL

• Eligible Ages:

  18 and up

Participation Criteria

Inclusion criteria:

Part I:

* Adult greater than or equal to (\>=)18 years of age or Canadian adult \>=19 years of age
* Ability to consent, as judged by the study investigator
* Diagnosis of at least one psychiatric disorder of at least 12 months duration, based on International classification of diseases (ICD)-10 codes registered in electronic health records
* Consecutive assessment for ADHD (as per routine clinical practice)
* Able to read and write in the first language of the respective country

Part II

* Inclusion in study Part I
* Diagnosis of ADHD during Part I, according to routine diagnostic procedure and algorithms
* Anticipated availability for being followed over 9 months

Exclusion criteria:

Part I:

* Diagnosis of any of the following at any time prior to signing informed consent: schizoaffective disorder, intellectual disability, or other cognitive disorders
* Occurrence of any of the following events within the 6 months prior to signing consent: psychotic episodes, acute intoxication, or psychotropic drug withdrawal syndrome.
* Diagnosis of ADHD at any time before study inclusion
* Serious and unstable medical condition (severe disease that limits survival to 1 year)
* Participation in a clinical interventional trial in the 12 months prior signing consent

Part II:

- Participant being followed-up for ADHD in a different site