{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?page=3&sponsor=Mathematica+Policy+Research%2C+Inc.",
    "query": {
      "sponsor": "Mathematica Policy Research, Inc.",
      "page": 3
    },
    "page_size": 10
  },
  "pagination": {
    "page": 3,
    "page_size": 10,
    "total_count": 55,
    "total_pages": 6,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?page=4&sponsor=Mathematica+Policy+Research%2C+Inc.&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?page=2&sponsor=Mathematica+Policy+Research%2C+Inc.&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-06T04:33:27.985Z",
  "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": "NCT05145933",
      "title": "Head Start REACH: Strengthening Outreach, Recruitment and Engagement Approaches With Families",
      "overall_status": "UNKNOWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Early Intervention, Educational (Head Start and Early Head Start Access and Participation)"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Mathematica Policy Research, Inc.",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 174,
      "start_date": "2022-01-03",
      "completion_date": "2023-06-30",
      "has_results": false,
      "last_update_posted_date": "2021-12-06",
      "last_synced_at": "2026-10-06T04:33:27.985Z",
      "location_count": 1,
      "location_summary": "Washington D.C., District of Columbia",
      "locations": [
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05145933"
    },
    {
      "nct_id": "NCT02787460",
      "title": "Testing the Effectiveness of Behavioral Text Messages to Promote Attendance at HMRE Sessions",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Family Relations",
        "Marriage"
      ],
      "interventions": [
        {
          "name": "Behavioral Text Messages",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Mathematica Policy Research, Inc.",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 1904,
      "start_date": "2017-01",
      "completion_date": "2020-04",
      "has_results": false,
      "last_update_posted_date": "2021-02-02",
      "last_synced_at": "2026-10-06T04:33:27.985Z",
      "location_count": 1,
      "location_summary": "Gainesville, Florida",
      "locations": [
        {
          "city": "Gainesville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02787460"
    },
    {
      "nct_id": "NCT03842111",
      "title": "American Indian and Alaska Native Head Start Family and Child Experiences Survey",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Head Start Participation"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Mathematica Policy Research, Inc.",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "3 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "3 Years and older"
      },
      "enrollment_count": 1194,
      "start_date": "2014-10-01",
      "completion_date": "2016-06-30",
      "has_results": false,
      "last_update_posted_date": "2019-10-08",
      "last_synced_at": "2026-10-06T04:33:27.985Z",
      "location_count": 1,
      "location_summary": "Washington D.C., District of Columbia",
      "locations": [
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03842111"
    },
    {
      "nct_id": "NCT05219045",
      "title": "Ohio RETAIN Impact Evaluation",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Disability"
      ],
      "interventions": [
        {
          "name": "Ohio RETAIN",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Mathematica Policy Research, 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": 4525,
      "start_date": "2022-01-19",
      "completion_date": "2026-02-28",
      "has_results": false,
      "last_update_posted_date": "2026-03-06",
      "last_synced_at": "2026-10-06T04:33:27.985Z",
      "location_count": 1,
      "location_summary": "Columbus, Ohio",
      "locations": [
        {
          "city": "Columbus",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05219045"
    },
    {
      "nct_id": "NCT02829411",
      "title": "Testing the Effectiveness of Integrating Relationship Education Into an Existing Workforce Readiness Program",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Marriage",
        "Family Relations"
      ],
      "interventions": [
        {
          "name": "Workforce Readiness Program",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Relationship education",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Mathematica Policy Research, Inc.",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "30 Years",
        "sex": "ALL",
        "summary": "18 Years to 30 Years"
      },
      "enrollment_count": 909,
      "start_date": "2016-08",
      "completion_date": "2020-12",
      "has_results": false,
      "last_update_posted_date": "2021-04-05",
      "last_synced_at": "2026-10-06T04:33:27.985Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02829411"
    },
    {
      "nct_id": "NCT00627029",
      "title": "Evaluation of Programs of Coordinated Care and Disease Management",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Congestive Heart Failure",
        "Diabetes",
        "Coronary Artery Disease",
        "Chronic Obstructive Pulmonary Disease",
        "Cancer",
        "Cerebrovascular Disease",
        "Alzheimer's Disease",
        "Psychotic Disorder",
        "Major Depression"
      ],
      "interventions": [
        {
          "name": "Care Coordination",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Mathematica Policy Research, Inc.",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 18277,
      "start_date": "2000-09",
      "completion_date": "2016-12",
      "has_results": false,
      "last_update_posted_date": "2015-10-01",
      "last_synced_at": "2026-10-06T04:33:27.985Z",
      "location_count": 15,
      "location_summary": "Phoenix, Arizona • Washington D.C., District of Columbia • Sunrise, Florida + 12 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        },
        {
          "city": "Sunrise",
          "state": "Florida"
        },
        {
          "city": "Rosemont",
          "state": "Illinois"
        },
        {
          "city": "Urbana",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00627029"
    },
    {
      "nct_id": "NCT01565304",
      "title": "Evaluation of the Effectiveness of the POWER Through Choices Program",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Pregnancy",
        "Sexually Transmitted Infections"
      ],
      "interventions": [
        {
          "name": "POWER Through Choices",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Mathematica Policy Research, Inc.",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "13 Years",
        "maximum_age": "18 Years",
        "sex": "ALL",
        "summary": "13 Years to 18 Years"
      },
      "enrollment_count": 1039,
      "start_date": "2012-01",
      "completion_date": "2015-07",
      "has_results": false,
      "last_update_posted_date": "2015-09-23",
      "last_synced_at": "2026-10-06T04:33:27.985Z",
      "location_count": 3,
      "location_summary": "Bakersfield, California • Baltimore, Maryland • Oklahoma City, Oklahoma",
      "locations": [
        {
          "city": "Bakersfield",
          "state": "California"
        },
        {
          "city": "Baltimore",
          "state": "Maryland"
        },
        {
          "city": "Oklahoma City",
          "state": "Oklahoma"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01565304"
    },
    {
      "nct_id": "NCT01041014",
      "title": "Cost Effectiveness of Language Services in Hospital Emergency Departments (EDs)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Language Discordance"
      ],
      "interventions": [
        {
          "name": "Professional medical interpreter",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Mathematica Policy Research, Inc.",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 447,
      "start_date": "2008-10",
      "completion_date": "2010-01",
      "has_results": false,
      "last_update_posted_date": "2015-10-01",
      "last_synced_at": "2026-10-06T04:33:27.985Z",
      "location_count": 2,
      "location_summary": "Freehold, New Jersey • New Brunswick, New Jersey",
      "locations": [
        {
          "city": "Freehold",
          "state": "New Jersey"
        },
        {
          "city": "New Brunswick",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01041014"
    },
    {
      "nct_id": "NCT06574217",
      "title": "Evaluation of Stepping Stones",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Teen Pregnancy Prevention"
      ],
      "interventions": [
        {
          "name": "Stepping Stones (StSt)",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Like",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "The Policy & Research Group",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "22 Years",
        "sex": "ALL",
        "summary": "12 Years to 22 Years"
      },
      "enrollment_count": 650,
      "start_date": "2024-09-16",
      "completion_date": "2028-09-14",
      "has_results": false,
      "last_update_posted_date": "2026-05-13",
      "last_synced_at": "2026-10-06T04:33:27.985Z",
      "location_count": 1,
      "location_summary": "New Orleans, Louisiana",
      "locations": [
        {
          "city": "New Orleans",
          "state": "Louisiana"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06574217"
    },
    {
      "nct_id": "NCT04046965",
      "title": "American Indian and Alaska Native Head Start Family and Child Experiences Survey (AIAN FACES 2019)",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Head Start Participation"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Mathematica Policy Research, Inc.",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "2 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "2 Years and older"
      },
      "enrollment_count": 1587,
      "start_date": "2019-09-01",
      "completion_date": "2020-07-31",
      "has_results": false,
      "last_update_posted_date": "2024-08-02",
      "last_synced_at": "2026-10-06T04:33:27.985Z",
      "location_count": 1,
      "location_summary": "Washington D.C., District of Columbia",
      "locations": [
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04046965"
    }
  ]
}