This research aims to collect comprehensive data on the clinical trial experience of OCD patients. Its goal is to identify the factors that limit patients' ability to join or complete a trial successfully. Clinical trial participation often favors specific demographic groups, and limited research exists on the impact of trial attributes on participation. Therefore, this study aims to analyze data from various demographic groups and identify any recurring trends that could provide valuable insights for future OCD patients.

Inclusion Criteria:

• Ability to provide written informed consent obtained prior to participation in the study and any related procedures being performed.
• Participant has a diagnosis of OCD.
• Willing and able to comply with scheduled visits, treatment schedule, laboratory tests and other requirements of the study.

Exclusion Criteria:

• Pregnant or lactating woman
• Enrolled in another research study
• Any mental or medical condition that prevents the patient from giving informed consent or participating in the trial

Participants with OCD who are actively considering involvement in an observational clinical trial, but have not yet completed enrollment and registration.