{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Feedback+letters",
    "query": {
      "intervention": "Feedback letters"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 15,
    "total_pages": 2,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Feedback+letters&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-08T20:22:24.351Z",
  "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": "NCT02660086",
      "title": "Promoting Employee Health Through The Worksite Food Environment",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Weight",
        "Food Choice",
        "Nutrition Intake"
      ],
      "interventions": [
        {
          "name": "Personalized nutrition feedback",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Massachusetts General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "21 Years to 75 Years"
      },
      "enrollment_count": 602,
      "start_date": "2016-09",
      "completion_date": "2020-03-15",
      "has_results": true,
      "last_update_posted_date": "2021-12-01",
      "last_synced_at": "2026-09-08T20:22:24.351Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02660086"
    },
    {
      "nct_id": "NCT04118595",
      "title": "Reducing the Transition From Acute to Chronic Musculoskeletal Pain Among Older Adults",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Acute Musculoskeletal Pain",
        "Chronic Pain"
      ],
      "interventions": [
        {
          "name": "Educational Video",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Telecare",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Correspondence with Primary Care Provider",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of North Carolina, Chapel Hill",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "50 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "50 Years and older"
      },
      "enrollment_count": 330,
      "start_date": "2020-02-03",
      "completion_date": "2023-06-22",
      "has_results": true,
      "last_update_posted_date": "2023-11-21",
      "last_synced_at": "2026-09-08T20:22:24.351Z",
      "location_count": 1,
      "location_summary": "Chapel Hill, North Carolina",
      "locations": [
        {
          "city": "Chapel Hill",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04118595"
    },
    {
      "nct_id": "NCT04045288",
      "title": "SWITCH Implementation Effectiveness Trial",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Sedentary Behavior",
        "Health Promotion",
        "Overweight and Obesity",
        "Healthy Lifestyle",
        "Diet, Healthy"
      ],
      "interventions": [
        {
          "name": "Standard Implementation",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Enhanced Implementation",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Iowa State University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "9 Years",
        "maximum_age": "11 Years",
        "sex": "ALL",
        "summary": "9 Years to 11 Years"
      },
      "enrollment_count": 1984,
      "start_date": "2017-08-15",
      "completion_date": "2018-05-15",
      "has_results": false,
      "last_update_posted_date": "2019-08-05",
      "last_synced_at": "2026-09-08T20:22:24.351Z",
      "location_count": 1,
      "location_summary": "Ames, Iowa",
      "locations": [
        {
          "city": "Ames",
          "state": "Iowa"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04045288"
    },
    {
      "nct_id": "NCT01604499",
      "title": "Building on a Point-of-purchase Intervention to Encourage Healthy Food Choices",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Food Labeling"
      ],
      "interventions": [
        {
          "name": "Feedback letters",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Feedback plus incentives",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Massachusetts General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 2672,
      "start_date": "2012-09",
      "completion_date": "2013-05",
      "has_results": false,
      "last_update_posted_date": "2015-10-06",
      "last_synced_at": "2026-09-08T20:22:24.351Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01604499"
    },
    {
      "nct_id": "NCT04997356",
      "title": "Hostile Bias Modification Training (HBMT) Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Anger",
        "Stress",
        "Aggression"
      ],
      "interventions": [
        {
          "name": "Hostile Bias Modification Training",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Other training",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Walter Reed Army Institute of Research (WRAIR)",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "39 Years",
        "sex": "ALL",
        "summary": "18 Years to 39 Years"
      },
      "enrollment_count": 165,
      "start_date": "2021-08-12",
      "completion_date": "2023-05-15",
      "has_results": false,
      "last_update_posted_date": "2023-12-21",
      "last_synced_at": "2026-09-08T20:22:24.351Z",
      "location_count": 1,
      "location_summary": "Silver Spring, Maryland",
      "locations": [
        {
          "city": "Silver Spring",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04997356"
    },
    {
      "nct_id": "NCT01347619",
      "title": "iADAPT: Off Label Use of Antipsychotics in the Nursing Home",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Off-label Use of Atypical Antipsychotic Drugs"
      ],
      "interventions": [
        {
          "name": "Toolkit only with Web Access to Online Version",
          "type": "OTHER"
        },
        {
          "name": "Toolkit, Periodic Audit/Feedback, Educational Messages",
          "type": "OTHER"
        },
        {
          "name": "Items in Arm 2 plus Academic Detailing Program",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Massachusetts, Worcester",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 42,
      "start_date": "2010-11",
      "completion_date": "2013-09",
      "has_results": false,
      "last_update_posted_date": "2014-04-01",
      "last_synced_at": "2026-09-08T20:22:24.351Z",
      "location_count": 1,
      "location_summary": "Rocky Hill, Connecticut",
      "locations": [
        {
          "city": "Rocky Hill",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01347619"
    },
    {
      "nct_id": "NCT01126034",
      "title": "Improving Metoclopramide Prescribing Practices at Penn Through a Physician-targeted Intervention",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Gastroesophageal Reflux Disease",
        "Diabetic Gastroparesis"
      ],
      "interventions": [
        {
          "name": "intervention letter",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Pennsylvania",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 85,
      "start_date": "2007-03",
      "completion_date": "2008-04",
      "has_results": false,
      "last_update_posted_date": "2015-12-04",
      "last_synced_at": "2026-09-08T20:22:24.351Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01126034"
    },
    {
      "nct_id": "NCT04132219",
      "title": "Daughters, dUdes, Mothers and othErs Fighting Cancer Together",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Cancer",
        "Overweight and Obesity"
      ],
      "interventions": [
        {
          "name": "eHealth Intervention",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Alabama at Birmingham",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 112,
      "start_date": "2020-10-15",
      "completion_date": "2022-02-15",
      "has_results": false,
      "last_update_posted_date": "2022-12-15",
      "last_synced_at": "2026-09-08T20:22:24.351Z",
      "location_count": 1,
      "location_summary": "Birmingham, Alabama",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04132219"
    },
    {
      "nct_id": "NCT00365885",
      "title": "Showing Health Information Value in a Community Network",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Clinical Decision Support",
        "Medical Informatics Interventions",
        "Population Health Management",
        "Quality of Healthcare"
      ],
      "interventions": [
        {
          "name": "Computer-based clinical decision support.",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Duke University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 20108,
      "start_date": "2006-08",
      "completion_date": "2008-08",
      "has_results": false,
      "last_update_posted_date": "2014-07-11",
      "last_synced_at": "2026-09-08T20:22:24.351Z",
      "location_count": 1,
      "location_summary": "Durham, North Carolina",
      "locations": [
        {
          "city": "Durham",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00365885"
    },
    {
      "nct_id": "NCT04568824",
      "title": "Neurocognitive Factors in EdTech Intervention Response",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Reading Disability"
      ],
      "interventions": [
        {
          "name": "GraphoLearn reading intervention",
          "type": "OTHER"
        },
        {
          "name": "Vektor math control intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Connecticut",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "6 Years",
        "maximum_age": "10 Years",
        "sex": "ALL",
        "summary": "6 Years to 10 Years"
      },
      "enrollment_count": 450,
      "start_date": "2020-11-15",
      "completion_date": "2026-08-01",
      "has_results": false,
      "last_update_posted_date": "2025-09-02",
      "last_synced_at": "2026-09-08T20:22:24.351Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04568824"
    }
  ]
}