{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Reduced+intervention+letter",
    "query": {
      "intervention": "Reduced intervention letter"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 24,
    "total_pages": 3,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Reduced+intervention+letter&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-06T08:11:55.404Z",
  "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": "NCT02395120",
      "title": "Family Access to Dentist Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Dental Caries"
      ],
      "interventions": [
        {
          "name": "Standard letter",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Intervention letter",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Reduced intervention letter",
          "type": "BEHAVIORAL"
        },
        {
          "name": "DIG",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Reduced DIG",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Case Western Reserve University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "5 Years",
        "maximum_age": "10 Years",
        "sex": "ALL",
        "summary": "5 Years to 10 Years"
      },
      "enrollment_count": 1305,
      "start_date": "2015-08",
      "completion_date": "2017-05",
      "has_results": true,
      "last_update_posted_date": "2022-06-16",
      "last_synced_at": "2026-09-06T08:11:55.404Z",
      "location_count": 2,
      "location_summary": "Cleveland, Ohio • Seattle, Washington",
      "locations": [
        {
          "city": "Cleveland",
          "state": "Ohio"
        },
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02395120"
    },
    {
      "nct_id": "NCT02282306",
      "title": "Phone Interview to Prevent Recurring Opioid Overdoses",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Overdose",
        "Opioid-related Disorders",
        "Drug Addiction",
        "Drug Abuse",
        "Substance Abuse",
        "Opioid Use, Unspecified",
        "Opioid Dependence",
        "Drug Overdose"
      ],
      "interventions": [
        {
          "name": "TTIP-PRO",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Cincinnati",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 30,
      "start_date": "2014-09",
      "completion_date": "2015-02",
      "has_results": false,
      "last_update_posted_date": "2015-05-28",
      "last_synced_at": "2026-09-06T08:11:55.404Z",
      "location_count": 2,
      "location_summary": "Cincinnati, Ohio",
      "locations": [
        {
          "city": "Cincinnati",
          "state": "Ohio"
        },
        {
          "city": "Cincinnati",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02282306"
    },
    {
      "nct_id": "NCT01918696",
      "title": "Controlled Evaluation of a Computerized Anger-reduction Treatment for Suicide Prevention",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Anger",
        "Suicidal Ideation"
      ],
      "interventions": [
        {
          "name": "Anger Reduction Treatment",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Progressive Muscle Relaxation",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Control Condition",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Florida 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": 120,
      "start_date": "2013-10",
      "completion_date": "2016-09",
      "has_results": false,
      "last_update_posted_date": "2021-01-29",
      "last_synced_at": "2026-09-06T08:11:55.404Z",
      "location_count": 1,
      "location_summary": "Tallahassee, Florida",
      "locations": [
        {
          "city": "Tallahassee",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01918696"
    },
    {
      "nct_id": "NCT01763216",
      "title": "Improving Mood in Assisted Living Settings",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Depressive Symptoms",
        "Clinical Depression"
      ],
      "interventions": [
        {
          "name": "Road Tour",
          "type": "OTHER"
        },
        {
          "name": "Boatload of Crosswords",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Marianne Smith",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "55 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "55 Years and older"
      },
      "enrollment_count": 351,
      "start_date": "2013-02",
      "completion_date": "2020-11-06",
      "has_results": false,
      "last_update_posted_date": "2020-11-09",
      "last_synced_at": "2026-09-06T08:11:55.404Z",
      "location_count": 32,
      "location_summary": "Amana, Iowa • Bettendorf, Iowa • Carlisle, Iowa + 17 more",
      "locations": [
        {
          "city": "Amana",
          "state": "Iowa"
        },
        {
          "city": "Bettendorf",
          "state": "Iowa"
        },
        {
          "city": "Carlisle",
          "state": "Iowa"
        },
        {
          "city": "Cedar Falls",
          "state": "Iowa"
        },
        {
          "city": "Cedar Rapids",
          "state": "Iowa"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01763216"
    },
    {
      "nct_id": "NCT04323137",
      "title": "Encouraging Flu Vaccination Among High-Risk Patients Identified by ML",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Influenza",
        "Vaccination",
        "Health Promotion",
        "Health Behavior",
        "Risk Reduction"
      ],
      "interventions": [
        {
          "name": "Risk reduction",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Medical records-based recommendation",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Algorithm-based recommendation",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Geisinger Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "17 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "17 Years and older"
      },
      "enrollment_count": 117649,
      "start_date": "2020-09-21",
      "completion_date": "2021-09-21",
      "has_results": true,
      "last_update_posted_date": "2024-12-30",
      "last_synced_at": "2026-09-06T08:11:55.404Z",
      "location_count": 1,
      "location_summary": "Danville, Pennsylvania",
      "locations": [
        {
          "city": "Danville",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04323137"
    },
    {
      "nct_id": "NCT01930149",
      "title": "Promoting Cholesterol Screening",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Cardiovascular Diseases",
        "Lipid Testing",
        "Primary Prevention of Cardiovascular Disease"
      ],
      "interventions": [
        {
          "name": "Mailed patient outreach intervention",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Northwestern University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "35 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "35 Years to 75 Years"
      },
      "enrollment_count": 480,
      "start_date": "2013-12",
      "completion_date": "2014-06",
      "has_results": false,
      "last_update_posted_date": "2014-09-29",
      "last_synced_at": "2026-09-06T08:11:55.404Z",
      "location_count": 3,
      "location_summary": "Flagstaff, Arizona • Chicago, Illinois",
      "locations": [
        {
          "city": "Flagstaff",
          "state": "Arizona"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01930149"
    },
    {
      "nct_id": "NCT05509283",
      "title": "Nudging Flu Vaccination in Patients at Moderately High Risk for Flu and Flu-related Complications",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Influenza",
        "Vaccination",
        "Health Promotion",
        "Health Behavior",
        "Risk Reduction"
      ],
      "interventions": [
        {
          "name": "Risk Reduction",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Geisinger Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 40671,
      "start_date": "2022-09-13",
      "completion_date": "2022-10-26",
      "has_results": false,
      "last_update_posted_date": "2022-12-05",
      "last_synced_at": "2026-09-06T08:11:55.404Z",
      "location_count": 1,
      "location_summary": "Danville, Pennsylvania",
      "locations": [
        {
          "city": "Danville",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05509283"
    },
    {
      "nct_id": "NCT03662256",
      "title": "Reducing Childhood Hearing Loss in Rural Alaska Through a Preschool Screening and Referral Process Using Mobile Health and Telemedicine",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hearing Loss"
      ],
      "interventions": [
        {
          "name": "Current Primary Care Referral Process",
          "type": "OTHER"
        },
        {
          "name": "Telemedicine Referral Process",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Norton Sound Health Corporation",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "2 Years",
        "maximum_age": "6 Years",
        "sex": "ALL",
        "summary": "2 Years to 6 Years"
      },
      "enrollment_count": 155,
      "start_date": "2018-09-07",
      "completion_date": "2020-02-21",
      "has_results": false,
      "last_update_posted_date": "2020-06-16",
      "last_synced_at": "2026-09-06T08:11:55.404Z",
      "location_count": 1,
      "location_summary": "Nome, Alaska",
      "locations": [
        {
          "city": "Nome",
          "state": "Alaska"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03662256"
    },
    {
      "nct_id": "NCT04111887",
      "title": "Pilot Study Comparing Two Versions of Group Cognitive-behavioral Indicated Prevention Programs",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Depressive Symptoms"
      ],
      "interventions": [
        {
          "name": "Group-based therapy",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Oregon Research Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "28 Years",
        "sex": "ALL",
        "summary": "18 Years to 28 Years"
      },
      "enrollment_count": 91,
      "start_date": "2017-10-10",
      "completion_date": "2018-12-13",
      "has_results": false,
      "last_update_posted_date": "2020-09-16",
      "last_synced_at": "2026-09-06T08:11:55.404Z",
      "location_count": 1,
      "location_summary": "Eugene, Oregon",
      "locations": [
        {
          "city": "Eugene",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04111887"
    },
    {
      "nct_id": "NCT00815789",
      "title": "Cholesterol, Hypertension and Glucose Education Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Cardiovascular Disease",
        "Diabetes"
      ],
      "interventions": [
        {
          "name": "Tailored cardiovascular risk management (Nurse-administered )",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Duke University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 362,
      "start_date": "2008-12",
      "completion_date": "2011-12",
      "has_results": false,
      "last_update_posted_date": "2023-11-15",
      "last_synced_at": "2026-09-06T08:11:55.404Z",
      "location_count": 1,
      "location_summary": "Durham, North Carolina",
      "locations": [
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00815789"
    }
  ]
}