{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Sleep+Disorders%2C+Circadian+Rhythm&page=3",
    "query": {
      "condition": "Sleep Disorders, Circadian Rhythm",
      "page": 3
    },
    "page_size": 10
  },
  "pagination": {
    "page": 3,
    "page_size": 10,
    "total_count": 154,
    "total_pages": 16,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Sleep+Disorders%2C+Circadian+Rhythm&page=4&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Sleep+Disorders%2C+Circadian+Rhythm&page=2&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-07T18:31:37.204Z",
  "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": "NCT04468672",
      "title": "Eating Behaviors in Shift Workers",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Shift Work Type Circadian Rhythm Sleep Disorder",
        "Eating Behavior"
      ],
      "interventions": [
        {
          "name": "Portion size",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Columbia University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "20 Years",
        "maximum_age": "55 Years",
        "sex": "ALL",
        "summary": "20 Years to 55 Years"
      },
      "enrollment_count": 100,
      "start_date": "2020-12-14",
      "completion_date": "2027-06",
      "has_results": false,
      "last_update_posted_date": "2026-02-25",
      "last_synced_at": "2026-10-07T18:31:37.204Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04468672"
    },
    {
      "nct_id": "NCT01327040",
      "title": "Light Sensitization Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Chronobiology Disorders",
        "Circadian Rhythm Disorders",
        "Sleep Disorders, Circadian Rhythm"
      ],
      "interventions": [
        {
          "name": "light exposure",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Brigham and Women's Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "30 Years",
        "sex": "ALL",
        "summary": "21 Years to 30 Years"
      },
      "enrollment_count": 32,
      "start_date": "2010-10",
      "completion_date": "2020-12",
      "has_results": false,
      "last_update_posted_date": "2021-07-01",
      "last_synced_at": "2026-10-07T18:31:37.204Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01327040"
    },
    {
      "nct_id": "NCT04669574",
      "title": "Assessing Sleep and Circadian Rhythms in Primary Brain Tumors Patients",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Sleep Circadian Rhythms",
        "Chronodisruption"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "99 Years",
        "sex": "ALL",
        "summary": "18 Years to 99 Years"
      },
      "enrollment_count": 101,
      "start_date": "2021-06-29",
      "completion_date": "2024-12-09",
      "has_results": false,
      "last_update_posted_date": "2025-07-02",
      "last_synced_at": "2026-10-07T18:31:37.204Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04669574"
    },
    {
      "nct_id": "NCT03188263",
      "title": "Morning Light Treatment to Improve Glucose Metabolism",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "PreDiabetes",
        "Circadian Dysregulation"
      ],
      "interventions": [
        {
          "name": "Bright Light",
          "type": "OTHER"
        },
        {
          "name": "Dim Light",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Northwestern University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "35 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "35 Years to 70 Years"
      },
      "enrollment_count": 10,
      "start_date": "2017-09-05",
      "completion_date": "2019-12-31",
      "has_results": true,
      "last_update_posted_date": "2021-01-20",
      "last_synced_at": "2026-10-07T18:31:37.204Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03188263"
    },
    {
      "nct_id": "NCT04087603",
      "title": "Teen Sleep Health Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Sleep Disorders, Circadian Rhythm",
        "Adolescent Behavior"
      ],
      "interventions": [
        {
          "name": "Weekend Morning Bright Light & Early Bedtime",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Rush University Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "14 Years",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "14 Years to 17 Years"
      },
      "enrollment_count": 52,
      "start_date": "2017-01-05",
      "completion_date": "2019-05-12",
      "has_results": false,
      "last_update_posted_date": "2019-09-19",
      "last_synced_at": "2026-10-07T18:31:37.204Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04087603"
    },
    {
      "nct_id": "NCT01742182",
      "title": "Circadian Rhythms and Sleep-Wake Cycles in Parkinson's Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Parkinson's Disease"
      ],
      "interventions": [
        {
          "name": "Light exposure",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Massachusetts General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "55 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "55 Years to 85 Years"
      },
      "enrollment_count": 70,
      "start_date": "2012-06",
      "completion_date": "2018-06",
      "has_results": false,
      "last_update_posted_date": "2020-02-18",
      "last_synced_at": "2026-10-07T18:31:37.204Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01742182"
    },
    {
      "nct_id": "NCT06471374",
      "title": "Pathophysiology of Circadian Rhythm Delayed Sleep Wake Phase Disorder",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Delayed Sleep Phase Syndrome",
        "Delayed Sleep Phase"
      ],
      "interventions": [
        {
          "name": "Circadian rhythm assessment",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Light sensitivity assessment",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Colorado, Boulder",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": "40 Years",
        "sex": "ALL",
        "summary": "16 Years to 40 Years"
      },
      "enrollment_count": 66,
      "start_date": "2024-04-02",
      "completion_date": "2028-07",
      "has_results": false,
      "last_update_posted_date": "2026-06-17",
      "last_synced_at": "2026-10-07T18:31:37.204Z",
      "location_count": 2,
      "location_summary": "Boulder, Colorado • Chicago, Illinois",
      "locations": [
        {
          "city": "Boulder",
          "state": "Colorado"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06471374"
    },
    {
      "nct_id": "NCT04157244",
      "title": "The Music, Sleep and Dementia Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Dementia",
        "Alzheimer Disease",
        "Circadian Rhythm Disorders",
        "Circadian Rhythm Sleep Disorder",
        "Insomnia",
        "Hypersomnia",
        "Cognitive Impairment",
        "Cognitive Decline",
        "Mild Cognitive Impairment",
        "Frontotemporal Dementia",
        "Neurocognitive Disorders",
        "Vascular Dementia",
        "Sleep Disorder",
        "Memory Impairment"
      ],
      "interventions": [
        {
          "name": "Tailored music listening intervention",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Pennsylvania",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "110 Years",
        "sex": "ALL",
        "summary": "18 Years to 110 Years"
      },
      "enrollment_count": 32,
      "start_date": "2019-03-12",
      "completion_date": "2021-01-12",
      "has_results": false,
      "last_update_posted_date": "2021-01-13",
      "last_synced_at": "2026-10-07T18:31:37.204Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04157244"
    },
    {
      "nct_id": "NCT06384742",
      "title": "Shift Worker Intervention for Sleep Health",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Shift Work Type Circadian Rhythm Sleep Disorder",
        "Insomnia, Psychophysiological"
      ],
      "interventions": [
        {
          "name": "Shift Worker Intervention for Sleep Health",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Oregon State University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 60,
      "start_date": "2025-04-28",
      "completion_date": "2028-01-15",
      "has_results": false,
      "last_update_posted_date": "2025-05-02",
      "last_synced_at": "2026-10-07T18:31:37.204Z",
      "location_count": 1,
      "location_summary": "Corvallis, Oregon",
      "locations": [
        {
          "city": "Corvallis",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06384742"
    },
    {
      "nct_id": "NCT06366399",
      "title": "The Acute T-Rex (Timing of Resistance Exercise) Study",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Diabetes Mellitus, Type 2",
        "Insulin Resistance",
        "Glucose Intolerance",
        "Sleep Disturbance",
        "Overweight or Obesity",
        "Insulin Sensitivity"
      ],
      "interventions": [
        {
          "name": "Resistance Exercise Timing",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Utah",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": "74 Years",
        "sex": "ALL",
        "summary": "50 Years to 74 Years"
      },
      "enrollment_count": 20,
      "start_date": "2023-11-15",
      "completion_date": "2025-12-31",
      "has_results": false,
      "last_update_posted_date": "2025-04-03",
      "last_synced_at": "2026-10-07T18:31:37.204Z",
      "location_count": 1,
      "location_summary": "Salt Lake City, Utah",
      "locations": [
        {
          "city": "Salt Lake City",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06366399"
    }
  ]
}