{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Circadian+Rhythm+Sleep+Disorders&page=6",
    "query": {
      "condition": "Circadian Rhythm Sleep Disorders",
      "page": 6
    },
    "page_size": 10
  },
  "pagination": {
    "page": 6,
    "page_size": 10,
    "total_count": 155,
    "total_pages": 16,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Circadian+Rhythm+Sleep+Disorders&page=7&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Circadian+Rhythm+Sleep+Disorders&page=5&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-08T06:16:21.336Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT04886076",
      "title": "Sleep Profiles in REM Sleep Behavior Disorder",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Rapid Eye Movement Sleep Behavior Disorder"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Massachusetts General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "40 Years and older"
      },
      "enrollment_count": 30,
      "start_date": "2018-12-07",
      "completion_date": "2026-11",
      "has_results": false,
      "last_update_posted_date": "2025-11-05",
      "last_synced_at": "2026-10-08T06:16:21.336Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04886076"
    },
    {
      "nct_id": "NCT00120484",
      "title": "Effects of Vitamin B12 on the Body's Internal Clock",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Sleep Disorders, Circadian Rhythm"
      ],
      "interventions": [
        {
          "name": "Vitamin B12",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Brigham and Women's Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "30 Years",
        "sex": "ALL",
        "summary": "18 Years to 30 Years"
      },
      "enrollment_count": 10,
      "start_date": "2005-04",
      "completion_date": "2008-01",
      "has_results": false,
      "last_update_posted_date": "2010-01-14",
      "last_synced_at": "2026-10-08T06:16:21.336Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00120484"
    },
    {
      "nct_id": "NCT01672502",
      "title": "Fire Fighter Fatigue Management Program: Operation Fight Fatigue",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Shift-Work Sleep Disorder",
        "Insomnia",
        "Restless Leg Syndrome",
        "Obstructive Sleep Apnea",
        "Impaired Driving"
      ],
      "interventions": [
        {
          "name": "Sleep health education provided via a web-based program",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Sleep disorder detection and treatment",
          "type": "OTHER"
        },
        {
          "name": "Optimization of Sleep in Fire Station",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "OTHER"
      ],
      "sponsor": "Brigham and Women's Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 620,
      "start_date": "2012-09",
      "completion_date": "2014-05",
      "has_results": false,
      "last_update_posted_date": "2016-03-17",
      "last_synced_at": "2026-10-08T06:16:21.336Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01672502"
    },
    {
      "nct_id": "NCT05669703",
      "title": "NIMH Rhythms and Blues Study: A Prospective Natural History Study of Motor Activity, Mood States, and Bipolar Disorder",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Bipolar Disorder",
        "Major Depression",
        "Migraine"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "National Institute of Mental Health (NIMH)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "8 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "8 Years to 70 Years"
      },
      "enrollment_count": 1260,
      "start_date": "2023-11-03",
      "completion_date": "2027-07-31",
      "has_results": false,
      "last_update_posted_date": "2026-10-07",
      "last_synced_at": "2026-10-08T06:16:21.336Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05669703"
    },
    {
      "nct_id": "NCT03331822",
      "title": "The Effects of Bright Light Exposure on ICU Nurses",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Circadian Rhythm Disorders",
        "Sleep"
      ],
      "interventions": [
        {
          "name": "Bright Light",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Pittsburgh",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 31,
      "start_date": "2017-10-15",
      "completion_date": "2017-12-31",
      "has_results": false,
      "last_update_posted_date": "2018-12-14",
      "last_synced_at": "2026-10-08T06:16:21.336Z",
      "location_count": 1,
      "location_summary": "Pittsburgh, Pennsylvania",
      "locations": [
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03331822"
    },
    {
      "nct_id": "NCT06336525",
      "title": "Adult Sleep Health in the Rural Appalachia and Mississippi Delta Region and Its Relationships With Cardiometabolic Health Disparities.",
      "overall_status": "ENROLLING_BY_INVITATION",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Sleep Apnea",
        "Insomnia",
        "Sleep Deprivation",
        "Sleep Disorders, Circadian Rhythm",
        "Sleepiness, Excessive Daytime",
        "Fatigue"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Brigham and Women's Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "25 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "25 Years to 65 Years"
      },
      "enrollment_count": 3680,
      "start_date": "2024-05-08",
      "completion_date": "2027-01-31",
      "has_results": false,
      "last_update_posted_date": "2025-10-27",
      "last_synced_at": "2026-10-08T06:16:21.336Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06336525"
    },
    {
      "nct_id": "NCT02037438",
      "title": "Sustainable Methods, Algorithms, and Research Tools for Delivering Optimal Care Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Obstructive Sleep Apnea of Adult",
        "Insomnia",
        "Circadian Rhythm Sleep Disorder",
        "Sleep Related Movement Disorders",
        "Narcolepsy and Hypersomnia",
        "Parasomnia"
      ],
      "interventions": [
        {
          "name": "CONV care for the diagnosis and treatment of sleep disorders",
          "type": "OTHER"
        },
        {
          "name": "PCCM for the diagnosis and treatment of sleep disorders",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Stanford University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1836,
      "start_date": "2014-01",
      "completion_date": "2016-05",
      "has_results": true,
      "last_update_posted_date": "2019-03-04",
      "last_synced_at": "2026-10-08T06:16:21.336Z",
      "location_count": 1,
      "location_summary": "Redwood City, California",
      "locations": [
        {
          "city": "Redwood City",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02037438"
    },
    {
      "nct_id": "NCT03558893",
      "title": "Sleep and Circadian Mechanisms of Non-dipping Blood Pressure",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hypertension",
        "Cardiovascular Risk Factor"
      ],
      "interventions": [
        {
          "name": "Forced Desynchrony",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Oregon Health and Science University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "30 Years to 60 Years"
      },
      "enrollment_count": 30,
      "start_date": "2018-12-01",
      "completion_date": "2024-12-31",
      "has_results": true,
      "last_update_posted_date": "2026-07-20",
      "last_synced_at": "2026-10-08T06:16:21.336Z",
      "location_count": 1,
      "location_summary": "Portland, Oregon",
      "locations": [
        {
          "city": "Portland",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03558893"
    },
    {
      "nct_id": "NCT01195558",
      "title": "Patient Registry of Blind Subjects With Sleep-related Problems",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Sleep-wake Disorder in Blind Individuals"
      ],
      "interventions": [
        {
          "name": "Data collection on blindness and sleep problems",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Vanda Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 10000,
      "start_date": "2010-04",
      "completion_date": "2030-04",
      "has_results": false,
      "last_update_posted_date": "2020-06-24",
      "last_synced_at": "2026-10-08T06:16:21.336Z",
      "location_count": 1,
      "location_summary": "Washington D.C., District of Columbia",
      "locations": [
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01195558"
    },
    {
      "nct_id": "NCT05016219",
      "title": "Phase 2 - Rhythmic Light Therapy for Alzheimer's Disease Patients",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Mild Cognitive Impairment"
      ],
      "interventions": [
        {
          "name": "Circadian-Effective Light",
          "type": "DEVICE"
        },
        {
          "name": "Rhythmic Light",
          "type": "DEVICE"
        },
        {
          "name": "Placebo Light",
          "type": "DEVICE"
        },
        {
          "name": "Placebo Rhythmic Light",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Icahn School of Medicine at Mount Sinai",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "55 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "55 Years and older"
      },
      "enrollment_count": 120,
      "start_date": "2023-08-22",
      "completion_date": "2027-07-31",
      "has_results": false,
      "last_update_posted_date": "2026-05-29",
      "last_synced_at": "2026-10-08T06:16:21.336Z",
      "location_count": 2,
      "location_summary": "Menands, New York • New York, New York",
      "locations": [
        {
          "city": "Menands",
          "state": "New York"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05016219"
    }
  ]
}