{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Delayed+Sleep+Phase&page=2",
    "query": {
      "condition": "Delayed Sleep Phase",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 10,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Delayed+Sleep+Phase&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-05-22T03:42:12.889Z",
  "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": "NCT06949644",
      "title": "Pupillometry in Delayed Sleep Wake Phase Disorder",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Delayed Sleep-Wake Phase Disorder"
      ],
      "interventions": [
        {
          "name": "Light and Citalopram",
          "type": "COMBINATION_PRODUCT"
        }
      ],
      "intervention_types": [
        "COMBINATION_PRODUCT"
      ],
      "sponsor": "Northwestern University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "16 Years and older"
      },
      "enrollment_count": 220,
      "start_date": "2025-09-01",
      "completion_date": "2029-07-31",
      "has_results": false,
      "last_update_posted_date": "2026-04-08",
      "last_synced_at": "2026-05-22T03:42:12.889Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06949644"
    },
    {
      "nct_id": "NCT03980340",
      "title": "Breath Biomarkers for Sleep Loss and Circadian Timing",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Shift-Work Sleep Disorder",
        "Shift Work Type Circadian Rhythm Sleep Disorder",
        "Sleep Disorders, Circadian Rhythm",
        "Sleep Disorders, Intrinsic",
        "Advanced Sleep Phase Syndrome (ASPS)",
        "Advanced Sleep Phase Syndrome",
        "Advanced Sleep Phase",
        "Delayed Sleep Phase",
        "Delayed Sleep Phase Syndrome",
        "Non-24 Hour Sleep-Wake Disorder",
        "Irregular Sleep-Wake Syndrome"
      ],
      "interventions": [
        {
          "name": "Short Nap Intervention",
          "type": "BEHAVIORAL"
        },
        {
          "name": "No Nap Intervention",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Brigham and Women's Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "18 Years to 50 Years"
      },
      "enrollment_count": 5,
      "start_date": "2021-01-28",
      "completion_date": "2025-03-31",
      "has_results": false,
      "last_update_posted_date": "2025-08-03",
      "last_synced_at": "2026-05-22T03:42:12.889Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03980340"
    },
    {
      "nct_id": "NCT00593736",
      "title": "Efficacy of Ramelteon on Speeding Up Sleep in Subjects With Delayed Sleep Phase Syndrome",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Sleep Disorders, Circadian Rhythm"
      ],
      "interventions": [
        {
          "name": "Ramelteon",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Takeda",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 132,
      "start_date": "2007-10",
      "completion_date": "2008-05",
      "has_results": true,
      "last_update_posted_date": "2012-02-28",
      "last_synced_at": "2026-05-22T03:42:12.889Z",
      "location_count": 42,
      "location_summary": "Birmingham, Alabama • Tucson, Arizona • Hot Springs, Arkansas + 39 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Hot Springs",
          "state": "Arkansas"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Fountain Valley",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00593736"
    },
    {
      "nct_id": "NCT04690504",
      "title": "Validation of Circadian Biomarkers in Patients With Sleep Disorders",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Sleep Disorders, Circadian Rhythm",
        "Circadian Rhythm Disorders",
        "Circadian Rhythm Sleep Disorder",
        "Advanced Sleep Phase Syndrome (ASPS)",
        "Delayed Sleep Phase Syndrome",
        "Sleep Wake Disorders",
        "Sleep Disorder"
      ],
      "interventions": [
        {
          "name": "dim light melatonin onset (DLMO)",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Brigham and Women's Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": null,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 50,
      "start_date": "2021-11-02",
      "completion_date": "2024-07-01",
      "has_results": false,
      "last_update_posted_date": "2024-08-06",
      "last_synced_at": "2026-05-22T03:42:12.889Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04690504"
    },
    {
      "nct_id": "NCT03715465",
      "title": "The Clinical Utility of Measuring the Circadian Clock in Treatment of Delayed Sleep-Wake Phase Disorder",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Delayed Sleep Phase Syndrome"
      ],
      "interventions": [
        {
          "name": "Melatonin 0.5 MG",
          "type": "DRUG"
        },
        {
          "name": "Dim Light Melatonin Onset (salivary)",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "University of Michigan",
      "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": 44,
      "start_date": "2019-02-15",
      "completion_date": "2021-11-05",
      "has_results": true,
      "last_update_posted_date": "2022-11-25",
      "last_synced_at": "2026-05-22T03:42:12.889Z",
      "location_count": 1,
      "location_summary": "Ann Arbor, Michigan",
      "locations": [
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03715465"
    },
    {
      "nct_id": "NCT01557595",
      "title": "Blue Wavelength Light-blocking Glasses in ADHD-Insomnia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Attention Deficit Hyperactivity Disorder",
        "Delayed Sleep Phase Type Circadian Rhythm Sleep Disorder"
      ],
      "interventions": [
        {
          "name": "Polarized glasses designed to filter out blue light",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of Alabama at Birmingham",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "19 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "19 Years and older"
      },
      "enrollment_count": 22,
      "start_date": "2011-09",
      "completion_date": "2012-06",
      "has_results": true,
      "last_update_posted_date": "2017-12-13",
      "last_synced_at": "2026-05-22T03:42:12.889Z",
      "location_count": 1,
      "location_summary": "Birmingham, Alabama",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01557595"
    },
    {
      "nct_id": "NCT00796939",
      "title": "Effects of Light Treatment During Sleep on Young Men",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Depression"
      ],
      "interventions": [
        {
          "name": "Green light mask",
          "type": "DEVICE"
        },
        {
          "name": "Red Light Mask",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of California, San Diego",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "25 Years",
        "maximum_age": "60 Years",
        "sex": "MALE",
        "summary": "25 Years to 60 Years · Male only"
      },
      "enrollment_count": 30,
      "start_date": "2006-03",
      "completion_date": "2006-10",
      "has_results": false,
      "last_update_posted_date": "2015-04-10",
      "last_synced_at": "2026-05-22T03:42:12.889Z",
      "location_count": 1,
      "location_summary": "La Jolla, California",
      "locations": [
        {
          "city": "La Jolla",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00796939"
    },
    {
      "nct_id": "NCT02176824",
      "title": "Chronotherapy Randomized Controlled Trial",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Major Depressive Disorder",
        "Bipolar Depression",
        "Suicidal Ideation"
      ],
      "interventions": [
        {
          "name": "Total Sleep deprivation, Sleep Phase Advance, and Bright Light Therapy",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Partial Sleep deprivation, Sleep Phase Delay, and Low amber light.",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Treatment as usual",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "OTHER"
      ],
      "sponsor": "Medical University of South Carolina",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "18 Years to 90 Years"
      },
      "enrollment_count": 13,
      "start_date": "2014-06-01",
      "completion_date": "2016-04-07",
      "has_results": false,
      "last_update_posted_date": "2019-05-30",
      "last_synced_at": "2026-05-22T03:42:12.889Z",
      "location_count": 1,
      "location_summary": "Charleston, South Carolina",
      "locations": [
        {
          "city": "Charleston",
          "state": "South Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02176824"
    },
    {
      "nct_id": "NCT06226025",
      "title": "Correcting Circadian Rhythms to Breakthrough in Bipolar Disorder",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Bipolar Disorder",
        "Delayed Sleep-Wake Phase Disorder"
      ],
      "interventions": [
        {
          "name": "Melatonin",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        },
        {
          "name": "Behavioral sleep intervention",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Behavioral sleep control",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER",
        "BEHAVIORAL"
      ],
      "sponsor": "Leslie Swanson",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "18 Years to 60 Years"
      },
      "enrollment_count": 50,
      "start_date": "2024-08-13",
      "completion_date": "2026-12",
      "has_results": false,
      "last_update_posted_date": "2026-05-11",
      "last_synced_at": "2026-05-22T03:42:12.889Z",
      "location_count": 1,
      "location_summary": "Ann Arbor, Michigan",
      "locations": [
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06226025"
    },
    {
      "nct_id": "NCT03780088",
      "title": "Improving Access to Care: Testing an Integrated Care Mobile Health Intervention",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Insomnia",
        "Delayed Sleep Phase"
      ],
      "interventions": [
        {
          "name": "mTranS-C",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "18 Years",
        "sex": "ALL",
        "summary": "12 Years to 18 Years"
      },
      "enrollment_count": 52,
      "start_date": "2019-01-16",
      "completion_date": "2021-04-15",
      "has_results": false,
      "last_update_posted_date": "2021-08-17",
      "last_synced_at": "2026-05-22T03:42:12.889Z",
      "location_count": 1,
      "location_summary": "Atherton, California",
      "locations": [
        {
          "city": "Atherton",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03780088"
    }
  ]
}