Find NHLBI Clinical Trials

Search selected NHLBI-supported clinical trials and observational studies by condition, location, or age group. You can also view the complete list of NHLBI-funded studies at


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Are you an adult with a diagnosed sleep phase disorder? This study aims to assess the sleep patterns and quality of sleep in people who have sleep phase disorders to determine how the disorders affect their circadian rhythms. To participate in this study, you must be at least 18 years old and have a sleep phase disorder, such as advanced sleep-wake phase syndrome or delayed sleep-wake phase syndrome. This study is located in Chicago, Illinois.
Adult, Older Adult