Natural History Study of Serious Medical Events in PWS

Study Overview
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Brief Summary
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PATH for PWS is a study to help researchers better understand serious medical events in PWS over a 4-year period, as well as evaluate how PWS-related behaviors change over time. The data from this study is intended to inform the development and clinical trial design of potential new treatments.

Detailed Description
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Every 6 months, participants or their caregivers will be asked to update online surveys about medical problems and serious medical events, as well as provide information about conditions and behaviors often associated with PWS such as hyperphagia. Because this is an observational study, no study drug will be provided and no visits to a doctor or clinic are required.

Official Title
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Non-Interventional, Observational, Natural History Study of Serious Medical Events in Prader-Willi Syndrome

Conditions
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Prader-Willi Syndrome

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Participants must meet all of the following criteria: Confirmed diagnosis of PWS At least 5 years of age Live in the United States, Canada, Australia, or New Zealand Must be enrolled or willing to enroll in the Global PWS Registry (https://pwsregistry.org) Participants or their caregiver must also meet all of the following criteria: Have access to the internet to complete online surveys at least every 6 months Agree to receive reminders to complete online surveys Allow the staff to ask questions about survey responses if more information is needed and to enter data into the surveys Exclusion Criteria: Participants or their caregiver meeting any of the following criteria will be excluded: Is not able to read and understand English

Ages Eligible for Study
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Minimum Age: 5 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Evaluate the incidence of serious medical events | Serious medical events are those that result in death, are life-threatening, require hospitalization or an emergency room visit, or are medically significant | Up to 4 years | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Evaluate the incidence of non-serious thrombotic events | Thrombotic events include blood clots in a blood vessel, such as an artery or vein | Up to 4 years | 
| Analyze D-dimer concentrations in a subset of participants who agree to provide a blood sample | D-dimer is a protein in the blood that is present when a blood clot is forming or has formed | Up to 4 years | 
| Evaluate prescription medication use associated with serious medical events and thrombotic events |  | Up to 4 years | 
| Evaluate the change in weight |  | Up to 4 years | 
| Evaluate the change in height |  | Up to 4 years | 
| Evaluate the change in height-adjusted weight |  | Up to 4 years | 
| Evaluate PWS complexity using an online survey |  | Up to 4 years | 
| Evaluate the pattern of hyperphagia behaviors using an online survey | Hyperphagia means the intense, constant hunger that often occurs in individuals with PWS | Up to 4 years | 
| Evaluate hyperphagia management using an online survey |  | Up to 4 years | 
| Evaluate food-related behaviors using an online survey |  | Up to 4 years | 
| Analyze medical information to evaluate the natural history of PWS | Medical information will be from birth to before enrolling in the study | Up to 4 years | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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observational, non-interventional, Prader-Willi syndrome, PWS