{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Voicemail",
    "query": {
      "intervention": "Voicemail"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 9,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-05T08:59:51.952Z",
  "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": "NCT03294551",
      "title": "HPV Centralized R/R RCT #2 - New York State",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Vaccines"
      ],
      "interventions": [
        {
          "name": "HPV Vaccine Reminder Recall - Autodialer",
          "type": "BEHAVIORAL"
        },
        {
          "name": "HPV Vaccine Reminder Recall - Texting",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of California, Los Angeles",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "11 Years",
        "maximum_age": "14 Years",
        "sex": "ALL",
        "summary": "11 Years to 14 Years"
      },
      "enrollment_count": 37003,
      "start_date": "2017-10-27",
      "completion_date": "2019-11-05",
      "has_results": false,
      "last_update_posted_date": "2021-05-27",
      "last_synced_at": "2026-09-05T08:59:51.952Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03294551"
    },
    {
      "nct_id": "NCT00702455",
      "title": "Keep It Off: A Weight Loss Maintenance Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Weight Loss Maintenance"
      ],
      "interventions": [
        {
          "name": "Self-Directed (weight loss maintenance)",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Guided (weight loss maintenance)",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "HealthPartners Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "19 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "19 Years to 70 Years"
      },
      "enrollment_count": 419,
      "start_date": "2006-09",
      "completion_date": "2012-07",
      "has_results": false,
      "last_update_posted_date": "2012-11-21",
      "last_synced_at": "2026-09-05T08:59:51.952Z",
      "location_count": 1,
      "location_summary": "Bloomington, Minnesota",
      "locations": [
        {
          "city": "Bloomington",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00702455"
    },
    {
      "nct_id": "NCT07510373",
      "title": "Opioid Tapering After Hospital Discharge: Testing an Intervention to Improve Post-operative Opioid Prescribing",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Opioid Tapering"
      ],
      "interventions": [
        {
          "name": "Treatment as Usual (TAU)",
          "type": "OTHER"
        },
        {
          "name": "Telephonic Support (TS) Providers",
          "type": "OTHER"
        },
        {
          "name": "DOTS Intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Montefiore Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 42,
      "start_date": "2026-04-12",
      "completion_date": "2028-04",
      "has_results": false,
      "last_update_posted_date": "2026-05-11",
      "last_synced_at": "2026-09-05T08:59:51.952Z",
      "location_count": 1,
      "location_summary": "The Bronx, New York",
      "locations": [
        {
          "city": "The Bronx",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07510373"
    },
    {
      "nct_id": "NCT01775969",
      "title": "Effect of Modality on Discharge Instruction in Patients Receiving Outpatient Antibiotic Prescriptions From the Emergency Department",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Modality of Discharge Instructions"
      ],
      "interventions": [
        {
          "name": "Text Message",
          "type": "OTHER"
        },
        {
          "name": "Voicemail",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Hennepin Healthcare Research Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 2874,
      "start_date": "2011-05",
      "completion_date": "2013-02",
      "has_results": false,
      "last_update_posted_date": "2013-10-25",
      "last_synced_at": "2026-09-05T08:59:51.952Z",
      "location_count": 1,
      "location_summary": "Minneapolis, Minnesota",
      "locations": [
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01775969"
    },
    {
      "nct_id": "NCT01615770",
      "title": "Behavioral Maintenance Treatment for Smoking Cessation",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Smoking"
      ],
      "interventions": [
        {
          "name": "cognitive behavior therapy",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Stanford University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 304,
      "start_date": "2004-02",
      "completion_date": "2009-06",
      "has_results": false,
      "last_update_posted_date": "2016-03-03",
      "last_synced_at": "2026-09-05T08:59:51.952Z",
      "location_count": 2,
      "location_summary": "San Jose, California • Stanford, California",
      "locations": [
        {
          "city": "San Jose",
          "state": "California"
        },
        {
          "city": "Stanford",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01615770"
    },
    {
      "nct_id": "NCT05184933",
      "title": "Sleep and Circadian Mechanisms in Hypertension",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hypertension",
        "Cardiovascular Diseases",
        "Cardiovascular Risk Factors",
        "Circadian Rhythms",
        "Sleep"
      ],
      "interventions": [
        {
          "name": "At-home Polysomnography",
          "type": "OTHER"
        },
        {
          "name": "Circadian Protocol",
          "type": "OTHER"
        },
        {
          "name": "Rested Wakefulness Trial",
          "type": "OTHER"
        },
        {
          "name": "Overnight Sleep Trial",
          "type": "OTHER"
        },
        {
          "name": "Regularized Sleep Schedule",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "OTHER",
        "BEHAVIORAL"
      ],
      "sponsor": "Oregon Health and Science University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "25 Years",
        "maximum_age": "64 Years",
        "sex": "ALL",
        "summary": "25 Years to 64 Years"
      },
      "enrollment_count": 32,
      "start_date": "2022-08-04",
      "completion_date": "2029-03-30",
      "has_results": false,
      "last_update_posted_date": "2026-02-11",
      "last_synced_at": "2026-09-05T08:59:51.952Z",
      "location_count": 1,
      "location_summary": "Portland, Oregon",
      "locations": [
        {
          "city": "Portland",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05184933"
    },
    {
      "nct_id": "NCT07176988",
      "title": "Deconstructing Voice Therapy: Towards Enhanced Communication Outcomes",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Dysphonia",
        "Primary Muscle Tension Dysphonia (MTD)"
      ],
      "interventions": [
        {
          "name": "Hierarchical method",
          "type": "OTHER"
        },
        {
          "name": "Non Hierarchical method",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Emory University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "16 Years to 65 Years"
      },
      "enrollment_count": 120,
      "start_date": "2025-09-03",
      "completion_date": "2029-04",
      "has_results": false,
      "last_update_posted_date": "2025-10-20",
      "last_synced_at": "2026-09-05T08:59:51.952Z",
      "location_count": 1,
      "location_summary": "Atlanta, Georgia",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07176988"
    },
    {
      "nct_id": "NCT07556783",
      "title": "Increasing the Use of Self Measured Home Blood Pressure Logs in the Management of Hypertension",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Hypertension"
      ],
      "interventions": [
        {
          "name": "A structured, telephone-based educational outreach to encourage HBPM",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "AdventHealth",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 170,
      "start_date": "2025-11-19",
      "completion_date": "2026-04-08",
      "has_results": false,
      "last_update_posted_date": "2026-04-29",
      "last_synced_at": "2026-09-05T08:59:51.952Z",
      "location_count": 1,
      "location_summary": "Orlando, Florida",
      "locations": [
        {
          "city": "Orlando",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07556783"
    },
    {
      "nct_id": "NCT01907516",
      "title": "Managing Diabetes in Pregnancy Using Cell Phone/Internet Technology",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Diabetes During Pregnancy",
        "Gestational Diabetes"
      ],
      "interventions": [
        {
          "name": "Cell phone-internet home glucose reporting system",
          "type": "DEVICE"
        },
        {
          "name": "Voicemail home blood glucose reporting",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "BEHAVIORAL"
      ],
      "sponsor": "Hawaii Pacific Health",
      "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": 100,
      "start_date": "2009-02",
      "completion_date": "2011-06",
      "has_results": true,
      "last_update_posted_date": "2015-06-03",
      "last_synced_at": "2026-09-05T08:59:51.952Z",
      "location_count": 1,
      "location_summary": "Honolulu, Hawaii",
      "locations": [
        {
          "city": "Honolulu",
          "state": "Hawaii"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01907516"
    }
  ]
}