{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Efficacy+Message&page=18",
    "query": {
      "intervention": "Efficacy Message",
      "page": 18
    },
    "page_size": 10
  },
  "pagination": {
    "page": 18,
    "page_size": 10,
    "total_count": 458,
    "total_pages": 46,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Efficacy+Message&page=19&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Efficacy+Message&page=17&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-25T11:13:58.293Z",
  "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": "NCT04808479",
      "title": "Effectiveness of a CBT-based mHealth Intervention Targeting MOUD Retention, Adherence, and Opioid Use",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Opioid-use Disorder"
      ],
      "interventions": [
        {
          "name": "imFREE mCBT",
          "type": "BEHAVIORAL"
        },
        {
          "name": "mHealth ED",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of California, Los Angeles",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 210,
      "start_date": "2019-12-10",
      "completion_date": "2026-06-15",
      "has_results": false,
      "last_update_posted_date": "2026-07-07",
      "last_synced_at": "2026-10-25T11:13:58.293Z",
      "location_count": 1,
      "location_summary": "Tarzana, California",
      "locations": [
        {
          "city": "Tarzana",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04808479"
    },
    {
      "nct_id": "NCT06505993",
      "title": "Addressing COVID-19 Vaccine Hesitancy With Muliti-Level Interventions in Appalachia",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "COVID-19",
        "Vaccine Hesitancy"
      ],
      "interventions": [
        {
          "name": "Health Communication",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Health Communication + Structural",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Marc Kiviniemi",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "99 Years",
        "sex": "ALL",
        "summary": "18 Years to 99 Years"
      },
      "enrollment_count": 0,
      "start_date": "2026-09",
      "completion_date": "2027-09",
      "has_results": false,
      "last_update_posted_date": "2026-08-06",
      "last_synced_at": "2026-10-25T11:13:58.293Z",
      "location_count": 1,
      "location_summary": "Hazard, Kentucky",
      "locations": [
        {
          "city": "Hazard",
          "state": "Kentucky"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06505993"
    },
    {
      "nct_id": "NCT06096519",
      "title": "Effectiveness and Implementation of Text Messaging to Improve HIV Testing in Adolescents",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "HIV"
      ],
      "interventions": [
        {
          "name": "Information, motivation, behavioral skills treatment arm",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Information only control arm",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Northwestern University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "13 Years",
        "maximum_age": "19 Years",
        "sex": "ALL",
        "summary": "13 Years to 19 Years"
      },
      "enrollment_count": 360,
      "start_date": "2024-06-13",
      "completion_date": "2027-05-01",
      "has_results": false,
      "last_update_posted_date": "2026-07-09",
      "last_synced_at": "2026-10-25T11:13:58.293Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06096519"
    },
    {
      "nct_id": "NCT04637412",
      "title": "Perceived Effectiveness of Added Sugar Labels",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Health Knowledge",
        "Attitude to Health"
      ],
      "interventions": [
        {
          "name": "Menu label",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of California, Davis",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1448,
      "start_date": "2020-11-13",
      "completion_date": "2020-12-26",
      "has_results": false,
      "last_update_posted_date": "2021-01-08",
      "last_synced_at": "2026-10-25T11:13:58.293Z",
      "location_count": 1,
      "location_summary": "Davis, California",
      "locations": [
        {
          "city": "Davis",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04637412"
    },
    {
      "nct_id": "NCT05430204",
      "title": "Continuous Glucose Monitoring for Screening for Diabetes in Pregnancy",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Gestational Diabetes"
      ],
      "interventions": [
        {
          "name": "Group 1: one-hour GCT",
          "type": "DEVICE"
        },
        {
          "name": "Group 2: CGM placement",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "The University of Texas Health Science Center, Houston",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "FEMALE",
        "summary": "18 Years and older · Female only"
      },
      "enrollment_count": 1628,
      "start_date": "2023-03-07",
      "completion_date": "2024-09-16",
      "has_results": true,
      "last_update_posted_date": "2025-12-04",
      "last_synced_at": "2026-10-25T11:13:58.293Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05430204"
    },
    {
      "nct_id": "NCT05096260",
      "title": "Getting to Yes, Michigan! (G2YMI)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "COVID-19 Vaccines",
        "COVID-19 Pandemic"
      ],
      "interventions": [
        {
          "name": "Motivational Interviewing based SMS/MMS and web content",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Michigan",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1180,
      "start_date": "2022-07-05",
      "completion_date": "2025-09-30",
      "has_results": true,
      "last_update_posted_date": "2026-05-01",
      "last_synced_at": "2026-10-25T11:13:58.293Z",
      "location_count": 1,
      "location_summary": "Ann Arbor, Michigan",
      "locations": [
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05096260"
    },
    {
      "nct_id": "NCT04288271",
      "title": "Teen Adherence in KidnEy Transplant Improving Tracking To Optimize Outcomes - Stage 3",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Medication Adherence",
        "Kidney Transplantation"
      ],
      "interventions": [
        {
          "name": "Adherence Intervention",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Healthy living education intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "OTHER"
      ],
      "sponsor": "McGill University Health Centre/Research Institute of the McGill University Health Centre",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "24 Years",
        "sex": "ALL",
        "summary": "12 Years to 24 Years"
      },
      "enrollment_count": 96,
      "start_date": "2022-02-04",
      "completion_date": "2023-06-30",
      "has_results": false,
      "last_update_posted_date": "2024-03-15",
      "last_synced_at": "2026-10-25T11:13:58.293Z",
      "location_count": 4,
      "location_summary": "St Louis, Missouri • Philadelphia, Pennsylvania • Pittsburgh, Pennsylvania + 1 more",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        },
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        },
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        },
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04288271"
    },
    {
      "nct_id": "NCT02941757",
      "title": "Feeding America's Bravest: Mediterranean Diet-Based Interventions to Change Firefighters' Eating Habits",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Diet, Mediterranean",
        "Health Behavior",
        "Program Sustainability",
        "Program Effectiveness"
      ],
      "interventions": [
        {
          "name": "Mediterranean diet Intervention",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Harvard School of Public Health (HSPH)",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 486,
      "start_date": "2016-10",
      "completion_date": "2019-12",
      "has_results": false,
      "last_update_posted_date": "2020-07-14",
      "last_synced_at": "2026-10-25T11:13:58.293Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02941757"
    },
    {
      "nct_id": "NCT06765291",
      "title": "Behavioral Intervention for Youth to Promote Vaping Cessation",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vaping",
        "Vaping Teens",
        "Nicotine Dependence"
      ],
      "interventions": [
        {
          "name": "QuitVaping",
          "type": "BEHAVIORAL"
        },
        {
          "name": "This is Quitting (TIQ)",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Massachusetts General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "14 Years",
        "maximum_age": "19 Years",
        "sex": "ALL",
        "summary": "14 Years to 19 Years"
      },
      "enrollment_count": 400,
      "start_date": "2025-06-18",
      "completion_date": "2029-08-31",
      "has_results": false,
      "last_update_posted_date": "2026-07-07",
      "last_synced_at": "2026-10-25T11:13:58.293Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06765291"
    },
    {
      "nct_id": "NCT06318975",
      "title": "Text-Based Messaging Strategies for Preventing Subsequent Problematic Alcohol Use",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Alcohol Drinking",
        "Binge Drinking",
        "Text Messaging"
      ],
      "interventions": [
        {
          "name": "Brief Alcohol Intervention",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Automated and Targeted Text Messages",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Virginia",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 7000,
      "start_date": "2023-12-01",
      "completion_date": "2028-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-06-15",
      "last_synced_at": "2026-10-25T11:13:58.293Z",
      "location_count": 1,
      "location_summary": "San Antonio, Texas",
      "locations": [
        {
          "city": "San Antonio",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06318975"
    }
  ]
}