{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Circadian+Rhythms&page=6",
    "query": {
      "condition": "Circadian Rhythms",
      "page": 6
    },
    "page_size": 10
  },
  "pagination": {
    "page": 6,
    "page_size": 10,
    "total_count": 258,
    "total_pages": 26,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Circadian+Rhythms&page=7&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Circadian+Rhythms&page=5&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-23T16:13:14.296Z",
  "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": "NCT02175472",
      "title": "Efficacy Study of Light Therapy as an Adjunctive Treatment for Parkinson's Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Parkinson Disease"
      ],
      "interventions": [
        {
          "name": "Spectramax light therapy device",
          "type": "DEVICE"
        },
        {
          "name": "Control light device",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "PhotoPharmics, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "45 Years and older"
      },
      "enrollment_count": 92,
      "start_date": "2014-06",
      "completion_date": "2016-12-23",
      "has_results": true,
      "last_update_posted_date": "2018-10-23",
      "last_synced_at": "2026-10-23T16:13:14.296Z",
      "location_count": 2,
      "location_summary": "Boston, Massachusetts • Orem, Utah",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Orem",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02175472"
    },
    {
      "nct_id": "NCT03813654",
      "title": "Sleep and Circadian Treatments for Shift Workers",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Shift-Work Sleep Disorder",
        "Shift-Work Related Sleep Disturbance"
      ],
      "interventions": [
        {
          "name": "8-h Afternoon-Evening Sleep",
          "type": "BEHAVIORAL"
        },
        {
          "name": "8-h Free Sleep",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Brigham and Women's Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "50 Years to 65 Years"
      },
      "enrollment_count": 33,
      "start_date": "2020-08-20",
      "completion_date": "2023-12-31",
      "has_results": true,
      "last_update_posted_date": "2025-08-15",
      "last_synced_at": "2026-10-23T16:13:14.296Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03813654"
    },
    {
      "nct_id": "NCT06158204",
      "title": "Improving Metabolic & Mental Health in Female Healthcare Shift Workers",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Sleep, Inadequate",
        "Overweight and Obesity",
        "Work Related Stress",
        "Healthy Lifestyle"
      ],
      "interventions": [
        {
          "name": "Lifestyle Intervention",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Auburn University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 50 Years · Female only"
      },
      "enrollment_count": 13,
      "start_date": "2024-01-02",
      "completion_date": "2025-03-01",
      "has_results": false,
      "last_update_posted_date": "2025-01-08",
      "last_synced_at": "2026-10-23T16:13:14.296Z",
      "location_count": 1,
      "location_summary": "Auburn, Alabama",
      "locations": [
        {
          "city": "Auburn",
          "state": "Alabama"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06158204"
    },
    {
      "nct_id": "NCT05099952",
      "title": "Sleep and Circadian Rhythm Study in Head and Neck Cancer Patients",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Head and Neck Squamous Cell Carcinoma"
      ],
      "interventions": [
        {
          "name": "Biospecimen Collection",
          "type": "PROCEDURE"
        },
        {
          "name": "Counseling",
          "type": "OTHER"
        },
        {
          "name": "Educational Intervention",
          "type": "OTHER"
        },
        {
          "name": "Electronic Health Record Review",
          "type": "OTHER"
        },
        {
          "name": "Medical Device Usage and Evaluation",
          "type": "OTHER"
        },
        {
          "name": "Questionnaire Administration",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "PROCEDURE",
        "OTHER"
      ],
      "sponsor": "Roswell Park Cancer Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 0,
      "start_date": "2021-12-15",
      "completion_date": "2026-12-15",
      "has_results": false,
      "last_update_posted_date": "2022-01-12",
      "last_synced_at": "2026-10-23T16:13:14.296Z",
      "location_count": 1,
      "location_summary": "Buffalo, New York",
      "locations": [
        {
          "city": "Buffalo",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05099952"
    },
    {
      "nct_id": "NCT02126007",
      "title": "Fatigue Management in HIV",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Fatigue"
      ],
      "interventions": [
        {
          "name": "Sleep and Rhythm Intervention",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Dietary Modifications",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 53,
      "start_date": "2014-10",
      "completion_date": "2015-12",
      "has_results": false,
      "last_update_posted_date": "2016-06-02",
      "last_synced_at": "2026-10-23T16:13:14.296Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02126007"
    },
    {
      "nct_id": "NCT05952284",
      "title": "Couples Health Aging, Rhythms and Sleep Study",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Aging",
        "Memory Loss"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of Utah",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 340,
      "start_date": "2023-09-14",
      "completion_date": "2027-07-21",
      "has_results": false,
      "last_update_posted_date": "2026-02-13",
      "last_synced_at": "2026-10-23T16:13:14.296Z",
      "location_count": 1,
      "location_summary": "Salt Lake City, Utah",
      "locations": [
        {
          "city": "Salt Lake City",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05952284"
    },
    {
      "nct_id": "NCT05628012",
      "title": "Circadian Time Restricted Eating",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Circadian Rhythm",
        "Cardiometabolic Health",
        "Weight Loss",
        "Cardiovascular Health",
        "Time Restricted Feeding"
      ],
      "interventions": [
        {
          "name": "Circadian Based Time Restricted Eating",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Oregon Health and Science University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "40 Years",
        "sex": "ALL",
        "summary": "18 Years to 40 Years"
      },
      "enrollment_count": 10,
      "start_date": "2023-04-01",
      "completion_date": "2024-12-01",
      "has_results": false,
      "last_update_posted_date": "2024-04-03",
      "last_synced_at": "2026-10-23T16:13:14.296Z",
      "location_count": 1,
      "location_summary": "Portland, Oregon",
      "locations": [
        {
          "city": "Portland",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05628012"
    },
    {
      "nct_id": "NCT03018912",
      "title": "Validating the Use of a Subjectively Reported Sleep Vital Sign",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Obstructive Sleep Apnea (OSA)",
        "Insomnia",
        "Restless Leg Syndrome (RLS)",
        "Hypersomnia Type; Sleep Disorder",
        "Shift Work Sleep Disorders"
      ],
      "interventions": [
        {
          "name": "Sleep VS",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Kaiser Permanente",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1260,
      "start_date": "2018-10-22",
      "completion_date": "2019-06-01",
      "has_results": false,
      "last_update_posted_date": "2026-07-21",
      "last_synced_at": "2026-10-23T16:13:14.296Z",
      "location_count": 1,
      "location_summary": "Fontana, California",
      "locations": [
        {
          "city": "Fontana",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03018912"
    },
    {
      "nct_id": "NCT07438912",
      "title": "Mind After Midnight",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Suicidal Ideation",
        "Circadian Rhythm Disorders",
        "Sleep Deprivation",
        "Sleep Wake Disorders"
      ],
      "interventions": [
        {
          "name": "Sleep Pressure Manipulation",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Arizona",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "55 Years",
        "sex": "ALL",
        "summary": "18 Years to 55 Years"
      },
      "enrollment_count": 90,
      "start_date": "2026-03-06",
      "completion_date": "2029-08-31",
      "has_results": false,
      "last_update_posted_date": "2026-10-01",
      "last_synced_at": "2026-10-23T16:13:14.296Z",
      "location_count": 1,
      "location_summary": "Tucson, Arizona",
      "locations": [
        {
          "city": "Tucson",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07438912"
    },
    {
      "nct_id": "NCT02909192",
      "title": "Bright Light Therapy for Non-motor Symptoms in Parkinson's Disease",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Parkinson's Disease"
      ],
      "interventions": [
        {
          "name": "Light Therapy Device",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Massachusetts General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "40 Years and older"
      },
      "enrollment_count": 65,
      "start_date": "2016-12",
      "completion_date": "2026-11",
      "has_results": false,
      "last_update_posted_date": "2025-11-05",
      "last_synced_at": "2026-10-23T16:13:14.296Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02909192"
    }
  ]
}