{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Retrospective+observational+study&page=2",
    "query": {
      "intervention": "Retrospective observational study",
      "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=Retrospective+observational+study&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-09-20T08:36:31.367Z",
  "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": "NCT01001559",
      "title": "Combination Deplin® and Antidepressant Therapy for a Major Depressive Episode (MDE)- a Retrospective Analysis",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Major Depressive Disorder"
      ],
      "interventions": [
        {
          "name": "L-methylfolate",
          "type": "DRUG"
        },
        {
          "name": "Selective serotonin reuptake inhibitor (SSRI)",
          "type": "DRUG"
        },
        {
          "name": "Serotonin and norepinephrine reuptake inhibitor (SNRI)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pamlab, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 242,
      "start_date": "2009-08",
      "completion_date": "2011-06",
      "has_results": true,
      "last_update_posted_date": "2013-12-19",
      "last_synced_at": "2026-09-20T08:36:31.367Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01001559"
    },
    {
      "nct_id": "NCT02037542",
      "title": "A Study of Lifestyle Intervention in Overweight or Obese Women With Early Stage Breast Cancer",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Weight"
      ],
      "interventions": [
        {
          "name": "Diet and exercise",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Baptist Health South Florida",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "89 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 89 Years · Female only"
      },
      "enrollment_count": 100,
      "start_date": "2013-09",
      "completion_date": "2016-05",
      "has_results": false,
      "last_update_posted_date": "2016-07-21",
      "last_synced_at": "2026-09-20T08:36:31.367Z",
      "location_count": 1,
      "location_summary": "Miami, Florida",
      "locations": [
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02037542"
    },
    {
      "nct_id": "NCT07199764",
      "title": "Maintenance Combinatorial Myeloid Immunotherapy for Unresectable Pancreatic Cancer",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Pancreatic Ductal Adenocarcinoma"
      ],
      "interventions": [
        {
          "name": "Odetiglucan",
          "type": "DRUG"
        },
        {
          "name": "Mitazalimab",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "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": 100,
      "start_date": "2025-11-25",
      "completion_date": "2028-12",
      "has_results": false,
      "last_update_posted_date": "2026-06-10",
      "last_synced_at": "2026-09-20T08:36:31.367Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07199764"
    },
    {
      "nct_id": "NCT05944133",
      "title": "Health Insurance Instability and Mortality Among Patients Receiving Bup Tx for OUD",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Opioid Use Disorder",
        "Opioid Overdose",
        "Death"
      ],
      "interventions": [
        {
          "name": "No intervention, observational retrospective study",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Kaiser Permanente",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "16 Years and older"
      },
      "enrollment_count": 27257,
      "start_date": "2023-03-29",
      "completion_date": "2026-02-28",
      "has_results": false,
      "last_update_posted_date": "2024-10-17",
      "last_synced_at": "2026-09-20T08:36:31.367Z",
      "location_count": 1,
      "location_summary": "Aurora, Colorado",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05944133"
    },
    {
      "nct_id": "NCT06744673",
      "title": "A Study to Assess the Pregnancy Outcome in Women Exposed to Dayvigo® During Pregnancy Compared to an Unexposed Control Population",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Sleep Initiation and Maintenance Disorders",
        "Pregnancy"
      ],
      "interventions": [
        {
          "name": "No Intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Eisai Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "16 Years",
        "maximum_age": "49 Years",
        "sex": "FEMALE",
        "summary": "16 Years to 49 Years · Female only"
      },
      "enrollment_count": 861,
      "start_date": "2025-01-03",
      "completion_date": "2025-12-30",
      "has_results": false,
      "last_update_posted_date": "2025-06-19",
      "last_synced_at": "2026-09-20T08:36:31.367Z",
      "location_count": 1,
      "location_summary": "Nutley, New Jersey",
      "locations": [
        {
          "city": "Nutley",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06744673"
    },
    {
      "nct_id": "NCT04785924",
      "title": "Imipenem/Cilastatin/Relebactam (IMI/REL) in Treatment of CRE Infections",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Carbapenem-Resistant Enterobacteriaceae Infection",
        "KPC",
        "Gram-Negative Bacterial Infections",
        "Antibiotic Resistant Infection"
      ],
      "interventions": [
        {
          "name": "Imipenem+Relebactam",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Wake Forest University Health Sciences",
      "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": "2021-06-07",
      "completion_date": "2023-01-12",
      "has_results": false,
      "last_update_posted_date": "2024-09-04",
      "last_synced_at": "2026-09-20T08:36:31.367Z",
      "location_count": 1,
      "location_summary": "Charlotte, North Carolina",
      "locations": [
        {
          "city": "Charlotte",
          "state": "North Carolina"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04785924"
    },
    {
      "nct_id": "NCT06425848",
      "title": "HF2 Registry - Hemodynamic Frontiers in Heart Failure Registry",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Heart Failure"
      ],
      "interventions": [
        {
          "name": "Observational",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of Kansas Medical Center",
      "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": 2000,
      "start_date": "2022-10-21",
      "completion_date": "2030-12-31",
      "has_results": false,
      "last_update_posted_date": "2024-05-22",
      "last_synced_at": "2026-09-20T08:36:31.367Z",
      "location_count": 12,
      "location_summary": "La Jolla, California • Bloomington, Indiana • Kansas City, Kansas + 9 more",
      "locations": [
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "Bloomington",
          "state": "Indiana"
        },
        {
          "city": "Kansas City",
          "state": "Kansas"
        },
        {
          "city": "Maplewood",
          "state": "Minnesota"
        },
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06425848"
    },
    {
      "nct_id": "NCT05375942",
      "title": "This is a Retrospective Observational Study Looking at the Characteristics and Outcomes of Participants Taking Inflectra Using the CorEvitas Rheumatoid Arthritis Registry",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Arthritis, Rheumatoid"
      ],
      "interventions": [
        {
          "name": "Inflectra",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Pfizer",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 255,
      "start_date": "2022-11-11",
      "completion_date": "2022-11-11",
      "has_results": true,
      "last_update_posted_date": "2024-04-12",
      "last_synced_at": "2026-09-20T08:36:31.367Z",
      "location_count": 1,
      "location_summary": "Collegeville, Pennsylvania",
      "locations": [
        {
          "city": "Collegeville",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05375942"
    },
    {
      "nct_id": "NCT04126005",
      "title": "Natural History Study of Patients With Canavan Disease (CANinform Study)",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Canavan Disease"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Aspa Therapeutics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 67,
      "start_date": "2019-10-10",
      "completion_date": "2025-08-31",
      "has_results": false,
      "last_update_posted_date": "2026-04-17",
      "last_synced_at": "2026-09-20T08:36:31.367Z",
      "location_count": 2,
      "location_summary": "Oakland, California • Boston, Massachusetts",
      "locations": [
        {
          "city": "Oakland",
          "state": "California"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04126005"
    },
    {
      "nct_id": "NCT04678661",
      "title": "My Dose Coach Mobile App to Support Insulin Titration and Maintenance",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Diabetes Mellitus Type 2 - Insulin-Treated"
      ],
      "interventions": [
        {
          "name": "Smartphone application and web portal",
          "type": "DEVICE"
        },
        {
          "name": "Standard Insulin Therapy Education",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "BEHAVIORAL"
      ],
      "sponsor": "Linda Siminerio",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 60,
      "start_date": "2021-02-15",
      "completion_date": "2023-02-16",
      "has_results": true,
      "last_update_posted_date": "2024-02-14",
      "last_synced_at": "2026-09-20T08:36:31.367Z",
      "location_count": 1,
      "location_summary": "Pittsburgh, Pennsylvania",
      "locations": [
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04678661"
    }
  ]
}