{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Control+Message&page=4",
    "query": {
      "intervention": "Control Message",
      "page": 4
    },
    "page_size": 10
  },
  "pagination": {
    "page": 4,
    "page_size": 10,
    "total_count": 1431,
    "total_pages": 144,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Control+Message&page=5&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Control+Message&page=3&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-18T02:04:45.932Z",
  "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": "NCT03027466",
      "title": "Integrating Use of Self-Affirmation Content Into a Mobile App to Promote Quit Attempts With Text-Based Smoking Cessation Intervention Messaging",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Number of Quit Attempts"
      ],
      "interventions": [
        {
          "name": "Self-affirmation induction",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "National Cancer Institute (NCI)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "99 Years",
        "sex": "ALL",
        "summary": "18 Years to 99 Years"
      },
      "enrollment_count": 7899,
      "start_date": "2018-03-06",
      "completion_date": "2019-09-01",
      "has_results": true,
      "last_update_posted_date": "2021-07-23",
      "last_synced_at": "2026-10-18T02:04:45.932Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03027466"
    },
    {
      "nct_id": "NCT05633251",
      "title": "Using Reinforcement Schedules to Increase Fruit&Vegetable Intake, Reduce Waste, and Increase School Lunch Participation",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Behavioral Changes",
        "Psychology, Social",
        "Nutrition"
      ],
      "interventions": [
        {
          "name": "Variable (random) interval",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Variable (non-random) interval",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Variable (random) interval with table tents",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Control",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "New Mexico State University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "11 Years",
        "maximum_age": "16 Years",
        "sex": "ALL",
        "summary": "11 Years to 16 Years"
      },
      "enrollment_count": 1626,
      "start_date": "2015-09-14",
      "completion_date": "2016-05-06",
      "has_results": false,
      "last_update_posted_date": "2022-12-01",
      "last_synced_at": "2026-10-18T02:04:45.932Z",
      "location_count": 1,
      "location_summary": "El Paso, Texas",
      "locations": [
        {
          "city": "El Paso",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05633251"
    },
    {
      "nct_id": "NCT01908517",
      "title": "Human Papilloma Viruses (HPV) Vaccine Adherence Community Clinic Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Patient Compliance"
      ],
      "interventions": [
        {
          "name": "HPV Vaccine Electronic Reminders",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "East Carolina University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "9 Years",
        "maximum_age": "17 Years",
        "sex": "ALL",
        "summary": "9 Years to 17 Years"
      },
      "enrollment_count": 522,
      "start_date": "2013-08",
      "completion_date": "2016-05",
      "has_results": false,
      "last_update_posted_date": "2016-05-25",
      "last_synced_at": "2026-10-18T02:04:45.932Z",
      "location_count": 2,
      "location_summary": "Greenville, North Carolina • Snow Hill, North Carolina",
      "locations": [
        {
          "city": "Greenville",
          "state": "North Carolina"
        },
        {
          "city": "Snow Hill",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01908517"
    },
    {
      "nct_id": "NCT07290335",
      "title": "Optimizing Strategies to Maximize Patient Recruitment Yield",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Recruitment"
      ],
      "interventions": [
        {
          "name": "Baseline (control) message",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Positively-valenced message",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Payment-inclusive message",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Positively-valenced, payment-inclusive message",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Emory University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 100000,
      "start_date": "2026-02-19",
      "completion_date": "2027-04",
      "has_results": false,
      "last_update_posted_date": "2026-02-25",
      "last_synced_at": "2026-10-18T02:04:45.932Z",
      "location_count": 1,
      "location_summary": "Atlanta, Georgia",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07290335"
    },
    {
      "nct_id": "NCT04710108",
      "title": "Testing Message Modality of Culturally Appropriate Nutrition Communication for Mexican American Women",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Sugar Sweetened Beverage Consumption",
        "Nutrition",
        "Lifestyle-related Condition",
        "Lifestyle Risk Reduction"
      ],
      "interventions": [
        {
          "name": "Health Communication",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of California, Merced",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "29 Years",
        "sex": "ALL",
        "summary": "18 Years to 29 Years"
      },
      "enrollment_count": 129,
      "start_date": "2020-12-02",
      "completion_date": "2021-12-25",
      "has_results": false,
      "last_update_posted_date": "2022-05-19",
      "last_synced_at": "2026-10-18T02:04:45.932Z",
      "location_count": 1,
      "location_summary": "Merced, California",
      "locations": [
        {
          "city": "Merced",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04710108"
    },
    {
      "nct_id": "NCT04629755",
      "title": "A Smartphone Intervention for Relational and Mental Well Being",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Depression",
        "Loneliness",
        "Relation, Interpersonal",
        "Covid19"
      ],
      "interventions": [
        {
          "name": "Intervention",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Washington",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 1765,
      "start_date": "2020-04-04",
      "completion_date": "2020-08-03",
      "has_results": false,
      "last_update_posted_date": "2020-11-19",
      "last_synced_at": "2026-10-18T02:04:45.932Z",
      "location_count": 1,
      "location_summary": "Seattle, Washington",
      "locations": [
        {
          "city": "Seattle",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04629755"
    },
    {
      "nct_id": "NCT06523985",
      "title": "The Feasibility of Using the PulsePoint to Facilitate Overdose Education and Naloxone Distribution",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Carrying Naloxone/Narcan on Their Person or in Their Vehicle",
        "Being Trained to Respond to an Opioid Overdose"
      ],
      "interventions": [
        {
          "name": "Push messages (standard)",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Push messages (customized)",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Indiana University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 5000,
      "start_date": "2024-08-07",
      "completion_date": "2026-10",
      "has_results": false,
      "last_update_posted_date": "2026-07-29",
      "last_synced_at": "2026-10-18T02:04:45.932Z",
      "location_count": 1,
      "location_summary": "Bloomington, Indiana",
      "locations": [
        {
          "city": "Bloomington",
          "state": "Indiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06523985"
    },
    {
      "nct_id": "NCT02676648",
      "title": "Web-Delivered Interventions for Blood Sugar Control for Individuals With Type 2 Diabetes",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Diabetes Mellitus, Type 2"
      ],
      "interventions": [
        {
          "name": "Multicomponent online program",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Breath meter",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Text messages",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Diet-appropriate foods and cookbooks",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Michigan",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 44,
      "start_date": "2016-02",
      "completion_date": "2017-11-15",
      "has_results": false,
      "last_update_posted_date": "2021-08-09",
      "last_synced_at": "2026-10-18T02:04:45.932Z",
      "location_count": 1,
      "location_summary": "Ann Arbor, Michigan",
      "locations": [
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02676648"
    },
    {
      "nct_id": "NCT04344028",
      "title": "Examining the Effectiveness of Cognitive Training",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Cognitive Change"
      ],
      "interventions": [
        {
          "name": "True Cognitive Training Program",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Control Cognitive Training Program",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Positive Expectation Induction",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Negative Expectation Induction",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Wisconsin, Madison",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 287,
      "start_date": "2020-05-11",
      "completion_date": "2022-08-09",
      "has_results": true,
      "last_update_posted_date": "2025-05-06",
      "last_synced_at": "2026-10-18T02:04:45.932Z",
      "location_count": 3,
      "location_summary": "Irvine, California • Riverside, California • Madison, Wisconsin",
      "locations": [
        {
          "city": "Irvine",
          "state": "California"
        },
        {
          "city": "Riverside",
          "state": "California"
        },
        {
          "city": "Madison",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04344028"
    },
    {
      "nct_id": "NCT01954407",
      "title": "Young Adults' Responses to Anti-smoking Messages",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Smoking"
      ],
      "interventions": [
        {
          "name": "Smoking-Related Messages",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Pennsylvania",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "25 Years",
        "sex": "ALL",
        "summary": "18 Years to 25 Years"
      },
      "enrollment_count": 2200,
      "start_date": "2013-09",
      "completion_date": "2013-12",
      "has_results": false,
      "last_update_posted_date": "2017-06-15",
      "last_synced_at": "2026-10-18T02:04:45.932Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01954407"
    }
  ]
}