Last updated on June 2019

Dallas 2K: A Natural History Study of Depression


Are you eligible to participate in this study?

You may be eligible for this study if you meet the following criteria:

  • Conditions: Endogenous depression | Bipolar Disorder | Depression
  • Age: Between 10 - 100 Years
  • Gender: Male or Female

Criteria for Inclusion of participants:

A potential participant will be eligible for participation in this study if the following criteria are met:

  1. Male and female adult or youth aged 10 and older of any race or ethnicity.
  2. Ability to speak, read, and understand English. However, the parent(s) or legal guardians of minors may either speak English or Spanish as the consenting process can be conducted bilingually.
  3. A lifetime or a current diagnosis of a mood disorder based upon a semi-structured diagnostic interview.
  4. Adults age 18 and older must be able to provide written informed consent; for youth younger than age 18, a parent or legal guardian must provide written informed consent, and the child or teen must provide written informed assent.

Eligibility for Healthy Controls

For comparison purposes, potential health control participants who do NOT have a psychiatric diagnosis will be enrolled as part of the healthy control arm of this study.

  1. Male and female adult or youth aged 10 and older of any race or ethnicity.
  2. Ability to speak, read, and understand English. However, the parent(s) or legal guardians of minors may either speak English or Spanish as the consenting process can be conducted bilingually.
  3. Adults age 18 and older must be able to provide written informed consent; for youth younger than age 18, a parent or legal guardian must provide written informed consent, and the child or teen must provide written informed assent.

Criteria for Exclusion of Participants

A potential participant will NOT be eligible for participation in this study if any of the following criteria are met:

  1. History of schizophrenia, schizoaffective disorders or chronic psychotic disorders based upon a semi-structured diagnostic interview.
  2. Diagnosis of human immunodeficiency virus (HIV) or hepatitis B or C (human immunodeficiency virus (HIV) testing is not required for this study).
  3. Unable to provide a stable home address and contact information.
  4. Has any condition for which, in the opinion of the investigator or designee, study participation would not be in their best interest (including but not limited to cognitive impairment, unstable general medical condition, intoxication, active psychosis) or that could prevent, limit, or confound the protocol-specified assessments.
  5. Requires immediate hospitalization for psychiatric disorder or suicidal risk as assessed by a licensed study clinician.

Eligibility for Healthy Controls

A potential Healthy Control participant will NOT be eligible for participation in this study if any of the following criteria are met:

  1. A lifetime or a current history of a mood disorder based upon a semi-structured diagnostic interview.
  2. Meets any exclusion criteria as part of the main D2K study interview.

Recruitment Status: Open


Brief Description Eligibility Contact Research Team


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