{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Opt-In+%28Call-Back%29",
    "query": {
      "intervention": "Opt-In (Call-Back)"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 5,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-09T04:21:17.838Z",
  "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": "NCT05738226",
      "title": "EpiCare@Home Validation Study for Focal Onset Seizures",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Epilepsy",
        "Seizures",
        "Seizures, Focal",
        "Seizure, Refractory"
      ],
      "interventions": [
        {
          "name": "EpiCare@Home, wearable multimodal seizure monitoring system",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Byteflies",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "12 Years and older"
      },
      "enrollment_count": 0,
      "start_date": "2023-01-23",
      "completion_date": "2023-12-31",
      "has_results": false,
      "last_update_posted_date": "2025-09-08",
      "last_synced_at": "2026-09-09T04:21:17.838Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05738226"
    },
    {
      "nct_id": "NCT04834726",
      "title": "COVID-19 Vaccine Text Outreach",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Covid19"
      ],
      "interventions": [
        {
          "name": "Opt-In (Call-Back)",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Opt-in (In-Bound)",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Standard Message",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Clinician Endorsement",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Scarcity",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Opt-Out Framing",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Phone Call",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Pennsylvania",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "16 Years and older"
      },
      "enrollment_count": 19554,
      "start_date": "2021-04-29",
      "completion_date": "2021-07-06",
      "has_results": true,
      "last_update_posted_date": "2023-03-27",
      "last_synced_at": "2026-09-09T04:21:17.838Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04834726"
    },
    {
      "nct_id": "NCT04313114",
      "title": "The PRIME-CRC Trial to Promote CRC Screening in Rural Communities",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Colorectal Cancer"
      ],
      "interventions": [
        {
          "name": "health literacy appropriate education and demonstration",
          "type": "BEHAVIORAL"
        },
        {
          "name": "shared decision making",
          "type": "BEHAVIORAL"
        },
        {
          "name": "automated call reminders or automated texts",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Louisiana State University Health Sciences Center Shreveport",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "45 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "45 Years to 75 Years"
      },
      "enrollment_count": 804,
      "start_date": "2021-09-20",
      "completion_date": "2026-05-31",
      "has_results": false,
      "last_update_posted_date": "2025-01-29",
      "last_synced_at": "2026-09-09T04:21:17.838Z",
      "location_count": 3,
      "location_summary": "Bastrop, Louisiana • Marion, Louisiana • Saint Joseph, Louisiana",
      "locations": [
        {
          "city": "Bastrop",
          "state": "Louisiana"
        },
        {
          "city": "Marion",
          "state": "Louisiana"
        },
        {
          "city": "Saint Joseph",
          "state": "Louisiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04313114"
    },
    {
      "nct_id": "NCT05245773",
      "title": "MORE-PC: A 30-day Automated SMS Program to Support Post-discharge Transitions of Care",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Care Transitions"
      ],
      "interventions": [
        {
          "name": "Automated SMS program to support post-discharge transitions of care",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Pennsylvania",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 5000,
      "start_date": "2022-03-29",
      "completion_date": "2023-02-03",
      "has_results": false,
      "last_update_posted_date": "2023-02-27",
      "last_synced_at": "2026-09-09T04:21:17.838Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05245773"
    },
    {
      "nct_id": "NCT06128239",
      "title": "Comparing Suicide Prevention Interventions to Guide Follow-up Care: The SPRING Trial",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Suicide",
        "Suicide Prevention",
        "Suicide and Self-harm"
      ],
      "interventions": [
        {
          "name": "Caring Contacts",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "St. Luke's Health System, Boise, Idaho",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "12 Years and older"
      },
      "enrollment_count": 854,
      "start_date": "2023-12-29",
      "completion_date": "2026-03-31",
      "has_results": false,
      "last_update_posted_date": "2025-07-09",
      "last_synced_at": "2026-09-09T04:21:17.838Z",
      "location_count": 1,
      "location_summary": "Boise, Idaho",
      "locations": [
        {
          "city": "Boise",
          "state": "Idaho"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06128239"
    }
  ]
}