{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Voucher+Reinforcement&page=2",
    "query": {
      "intervention": "Voucher Reinforcement",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 10,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Voucher+Reinforcement&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-09-25T14:17:09.940Z",
  "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": "NCT00158197",
      "title": "Long-term Behavior Change - 1",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Amphetamine-related Disorders"
      ],
      "interventions": [
        {
          "name": "contingency management voucher",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Friends Research Institute, Inc.",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 119,
      "start_date": "2004-12",
      "completion_date": "2008-06",
      "has_results": true,
      "last_update_posted_date": "2015-08-25",
      "last_synced_at": "2026-09-25T14:17:09.940Z",
      "location_count": 2,
      "location_summary": "Los Angeles, California • Rancho Cucamonga, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Rancho Cucamonga",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00158197"
    },
    {
      "nct_id": "NCT01693978",
      "title": "Contingency Outcomes in Prolonged Exposure",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Posttraumatic Stress Disorder",
        "Substance Use Disorder"
      ],
      "interventions": [
        {
          "name": "Prolonged Exposure Therapy",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Voucher-Based Reinforcement",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Johns Hopkins University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "100 Years",
        "sex": "ALL",
        "summary": "18 Years to 100 Years"
      },
      "enrollment_count": 126,
      "start_date": "2012-09",
      "completion_date": "2015-09",
      "has_results": false,
      "last_update_posted_date": "2016-08-31",
      "last_synced_at": "2026-09-25T14:17:09.940Z",
      "location_count": 1,
      "location_summary": "Baltimore, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01693978"
    },
    {
      "nct_id": "NCT00865956",
      "title": "A Comprehensive Disease Management Program for Medically-Complex Substance Users",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Substance-related Disorder"
      ],
      "interventions": [
        {
          "name": "Contingency Management",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Case management",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "OTHER"
      ],
      "sponsor": "Johns Hopkins University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 0,
      "start_date": "2008-03",
      "completion_date": "2010-06",
      "has_results": false,
      "last_update_posted_date": "2018-10-10",
      "last_synced_at": "2026-09-25T14:17:09.940Z",
      "location_count": 1,
      "location_summary": "Baltimore, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00865956"
    },
    {
      "nct_id": "NCT01142986",
      "title": "Evaluating Three Methods for Helping Syringe Exchangers Begin Methadone Maintenance",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Substance Abuse Disorder"
      ],
      "interventions": [
        {
          "name": "Low intensity care",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Voucher reinforcement",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Johns Hopkins University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 223,
      "start_date": "2010-07",
      "completion_date": "2015-10",
      "has_results": false,
      "last_update_posted_date": "2018-07-30",
      "last_synced_at": "2026-09-25T14:17:09.940Z",
      "location_count": 1,
      "location_summary": "Baltimore, Maryland",
      "locations": [
        {
          "city": "Baltimore",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01142986"
    },
    {
      "nct_id": "NCT01028131",
      "title": "Computer-Assisted Intervention for Smoking During Pregnancy",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Smoking"
      ],
      "interventions": [
        {
          "name": "Computer-delivered brief intervention (5As)",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Contingency Management",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Wayne State University",
      "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": 110,
      "start_date": "2007-06",
      "completion_date": "2010-01",
      "has_results": true,
      "last_update_posted_date": "2013-06-10",
      "last_synced_at": "2026-09-25T14:17:09.940Z",
      "location_count": 1,
      "location_summary": "Detroit, Michigan",
      "locations": [
        {
          "city": "Detroit",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01028131"
    },
    {
      "nct_id": "NCT01760759",
      "title": "Antiretroviral Therapy Adherence and Secondary Prevention of Human Immunodeficiency Virus",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "HIV"
      ],
      "interventions": [
        {
          "name": "cell phone reminders",
          "type": "BEHAVIORAL"
        },
        {
          "name": "contingency management for adherence",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "UConn Health",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 104,
      "start_date": "2012-11",
      "completion_date": "2019-04",
      "has_results": false,
      "last_update_posted_date": "2019-09-13",
      "last_synced_at": "2026-09-25T14:17:09.940Z",
      "location_count": 2,
      "location_summary": "Farmington, Connecticut • New Haven, Connecticut",
      "locations": [
        {
          "city": "Farmington",
          "state": "Connecticut"
        },
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01760759"
    },
    {
      "nct_id": "NCT00914381",
      "title": "Behavioral Treatment for Cocaine Dependent Women",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Cocaine Dependence"
      ],
      "interventions": [
        {
          "name": "Behavioral therapy",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Yale University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 50 Years · Female only"
      },
      "enrollment_count": 145,
      "start_date": "1994-12",
      "completion_date": "2002-03",
      "has_results": false,
      "last_update_posted_date": "2020-03-31",
      "last_synced_at": "2026-09-25T14:17:09.940Z",
      "location_count": 2,
      "location_summary": "New Haven, Connecticut",
      "locations": [
        {
          "city": "New Haven",
          "state": "Connecticut"
        },
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00914381"
    },
    {
      "nct_id": "NCT01693666",
      "title": "Lifestyle Intervention Forever: Healthy Weight for Pregnancy and Birth (Pilot Study)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Pregnancy",
        "Obesity",
        "Weight Gain",
        "Obstetric Complications"
      ],
      "interventions": [
        {
          "name": "Lifestyle intervention",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "St. Louis University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "40 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 40 Years · Female only"
      },
      "enrollment_count": 30,
      "start_date": "2012-09",
      "completion_date": "2015-07",
      "has_results": false,
      "last_update_posted_date": "2015-10-02",
      "last_synced_at": "2026-09-25T14:17:09.940Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01693666"
    },
    {
      "nct_id": "NCT01829555",
      "title": "A Pilot Study Examining a Reinforcement Approach to Improve Diabetes Management",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Type 1 Diabetes"
      ],
      "interventions": [
        {
          "name": "contingency management",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "UConn Health",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "15 Years",
        "maximum_age": "21 Years",
        "sex": "ALL",
        "summary": "15 Years to 21 Years"
      },
      "enrollment_count": 10,
      "start_date": "2013-02",
      "completion_date": "2014-08",
      "has_results": false,
      "last_update_posted_date": "2014-11-10",
      "last_synced_at": "2026-09-25T14:17:09.940Z",
      "location_count": 1,
      "location_summary": "New Haven, Connecticut",
      "locations": [
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01829555"
    },
    {
      "nct_id": "NCT02896712",
      "title": "Developing Adaptive Interventions for Cocaine Cessation and Relapse Prevention",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Cocaine-Related Disorders"
      ],
      "interventions": [
        {
          "name": "Acceptance and Commitment Therapy (ACT)",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Drug Counseling (DC)",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Contingency Management (CM)",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Modafinil",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "DRUG"
      ],
      "sponsor": "The University of Texas Health Science Center, Houston",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "18 Years to 60 Years"
      },
      "enrollment_count": 118,
      "start_date": "2016-11-18",
      "completion_date": "2021-09-13",
      "has_results": true,
      "last_update_posted_date": "2023-02-08",
      "last_synced_at": "2026-09-25T14:17:09.940Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02896712"
    }
  ]
}