Not medical advice. This website is not medical advice, a diagnosis, a match to a trial, or a recommendation to join a study. Listings are plain-English rewrites of public ClinicalTrials.gov records. Whether a site is still enrolling, and whether you qualify, can only be confirmed by the study team and your clinician. Source registry: ClinicalTrials.gov. Editorial rules: methodology.

408 recruiting in this snapshot

Observational clinical studies in plain English

Researchers measure what already happens. They do not assign the experimental treatment as the intervention.

ClinicalTrials.gov StudyType “observational” means the investigators collect data without assigning an experimental intervention as the study treatment. Natural-history, registry, and some biomarker studies look like this.

Observational research can still involve extra visits, surveys, or leftover samples, and it still uses consent when it is research. It will not, by itself, give you an investigational drug.

This hub lists snapshot rows whose StudyType is observational, regardless of Phase.

RecruitingNot a traditional drug phaseBethesda, Maryland
Not a traditional drug phase: testing 68-Gallium Dotatate for Hurthle Cell Thyroid Cancer

Participants in this study will be patients diagnosed with or suspected to have a thyroid nodule or thyroid cancer. The main purpose of this study is to further understand the methods for the diagnosis and treatment of thyroid nodules and thyroid cancer.

NCT00001160 · Official ClinicalTrials.gov record · National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

RecruitingNot a traditional drug phaseBethesda, Maryland
Study of Systemic Lupus Erythematosus

This protocol will evaluate patients with systemic lupus erythematosus (SLE) and their relatives to learn more about how the disease develops and changes over time. It will also study genetic factors that make a person susceptible to SLE.

NCT00001372 · Official ClinicalTrials.gov record · National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)

RecruitingNot a traditional drug phaseWashington D.C., District of Columbia
Familial Mediterranean Fever and Related Disorders: Genetics and Disease Characteristics

This study is designed to explore the genetics and pathophysiology of diseases presenting with intermittent fever, including familial Mediterranean fever, TRAPS, hyper-IgD syndrome, and related diseases. The following individuals may be eligible for this natural history study: 1) patients with known or suspected familial Mediterranean fever, TRAPS, hyper-IgD syndrome or related disorders; 2) relatives of these patients; 3) healthy, normal volunteers 7 years of age or older.

NCT00001373 · Official ClinicalTrials.gov record · National Human Genome Research Institute (NHGRI)

RecruitingNot a traditional drug phaseBethesda, Maryland
Role of Genetic Factors in the Development of Lung Disease

This study is designed to measure the genetics involved in the development of lung disease by surveying genes involved in the process of breathing and examining the genes in lung cells of patients with lung disease. The study will focus on defining the distribution of abnormal genes responsible for processes directly involved in different diseases affecting the lungs of patients and healthy volunteers.

NCT00001532 · Official ClinicalTrials.gov record · National Heart, Lung, and Blood Institute (NHLBI)

RecruitingNot a traditional drug phaseBethesda, Maryland
Evaluation of Patients With HAM/TSP

Objective: Human T-lymphotropic virus type-I-associated myelopathy / tropical spastic paraparesis (HAM/TSP) is a rare neurologic disorder that affects less than 5% of patients infected with the HTLV-I virus. The purpose of this protocol is to study the natural history of HAM/TSP by monitoring clinical progression of patients longitudinally.

NCT00001778 · Official ClinicalTrials.gov record · National Institute of Neurological Disorders and Stroke (NINDS)

RecruitingNot a traditional drug phaseBethesda, Maryland
Evaluation for NCI Surgery Branch Clinical Research Protocols

Background: The National Cancer Institute Surgery Branch (NCI-SB) has developed experimental therapies that involve taking white blood cells from patients' tumor or from their blood, growing them in the laboratory in large numbers, and then giving the cells back to the patient. Objective: This study will allow patients to under screening and evaluation for participation in NC-SB Protocols.

NCT00001823 · Official ClinicalTrials.gov record · National Cancer Institute (NCI)

RecruitingNot a traditional drug phaseBethesda, Maryland
Immune System Related Kidney Disease

Kidney diseases related to the immune system include, nephrotic syndrome, glomerulonephritis, membranous nephropathy, lupus nephritis, and nephritis associated with connective tissue disorders. This study will allow researchers to admit and follow patients suffering from autoimmune diseases of the kidney.

NCT00001979 · Official ClinicalTrials.gov record · National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

RecruitingNot a traditional drug phaseBethesda, Maryland
Collection of Serum and Tissue Samples From Patients With Biopsy-Proved or Suspected Malignant Disease

Selected individuals suspected of having or with prior biopsy proof of malignant disease will be seen in the Urologic Oncology Branch, NCI. Blood samples may be collected at the time of the initial visit and at periodic intervals during the course of the disease.

NCT00026884 · Official ClinicalTrials.gov record · National Cancer Institute (NCI)

RecruitingNot a traditional drug phaseBethesda, Maryland
Genetic Analysis of Birt Hogg-Dube Syndrome and Characterization of Predisposition to Kidney Cancer

This study will investigate the genetic cause of Birt Hogg-Dube (BHD) syndrome and the relationship of this disorder to kidney cancer. BHD is a rare inherited condition characterized by papules, or bumps-benign tumors involving hair follicles-on the head and neck.

NCT00033137 · Official ClinicalTrials.gov record · National Cancer Institute (NCI)

RecruitingNot a traditional drug phaseBethesda, Maryland
Leukapheresis Procedures to Obtain Plasma and Lymphocytes for Research Studies on Antiretroviral Naive HIV-…

There is evidence that early and aggressive treatment with antiretroviral drugs can prevent the loss of immune cell function that accompanies HIV infection. This study will use leukapheresis (drawing blood, separating out the white cells and returning the blood to the patient) to obtain blood cells from HIV-infected patients in either the acute or chronic stage of infection who are being treated with early highly active antiretroviral therapy (HAART).

NCT00039689 · Official ClinicalTrials.gov record · National Institute of Allergy and Infectious Diseases (NIAID)

RecruitingNot a traditional drug phaseWashington D.C., District of Columbia
Natural History of Sickle Cell Disease

This study is not a treatment protocol and no experimental treatments are involved. Study participants may be seen as needed for clinical, translational and basic research studies, or as medically indicated.

NCT00081523 · Official ClinicalTrials.gov record · National Heart, Lung, and Blood Institute (NHLBI)

RecruitingNot a traditional drug phaseBethesda, Maryland
Collection of Blood and Urine Samples in Patients Receiving Radiation Therapy for Glioblastoma Multiforme

This study will collect blood and urine samples from patients undergoing radiation therapy for glioblastoma multiforme (a type of brain tumor) to investigate the effects of this treatment on blood cells and certain proteins. The information from this study may help scientists develop new tests to measure radiation exposure and find new ways to treat cancer with radiation, and help determine which kinds of patients or tumors respond better to radiation therapy.

NCT00083512 · Official ClinicalTrials.gov record · National Cancer Institute (NCI)

RecruitingNot a traditional drug phaseBethesda, Maryland
Long-term Evaluation and Follow-up Care of Patients Treated With Stem Cell Transplants

This study will provide follow-up evaluation and care of patients who have undergone allogeneic (donor) stem cell transplantation at the NIH Clinical Center. Patients are monitored for their response to treatment, disease relapse, and later-occurring effects of the transplant.

NCT00106925 · Official ClinicalTrials.gov record · National Heart, Lung, and Blood Institute (NHLBI)

RecruitingNot a traditional drug phaseBethesda, Maryland
Evaluation of Patients With Immune Function Abnormalities

This study will evaluate patients with abnormal immune function that results in recurrent or unusual infections or chronic inflammation. This may include inherited conditions, such as X-linked severe combined immunodeficiency (XSCID), chronic granulomatous disease (CGD), and leukocyte adhesion deficiency (LAD), or conditions resulting from outside factors, such as graft-versus-host disease (GVHD).

NCT00128973 · Official ClinicalTrials.gov record · National Institute of Allergy and Infectious Diseases (NIAID)

RecruitingNot a traditional drug phaseWashington D.C., District of Columbia
Natural History Study of Patients With Excess Androgen

This study will evaluate and gather information in patients with genetic causes of too much androgen (male-like hormone) in order to better understand the effects of too much androgen and describe problems associated with it. Too much androgen in childhood, if untreated, results in rapid growth and early puberty with early cessation of growth and short stature in adulthood.

NCT00250159 · Official ClinicalTrials.gov record · Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)

RecruitingNot a traditional drug phaseBethesda, Maryland
Blood Sampling for Research Related to Sickle Cell Disease

This study will collect representative blood samples from healthy children and adults and from children and adults who have unique red blood cell features that are related to sickle cell disease. Sickle cell disease is a blood disease that limits the ability of red blood cells to carry oxygen throughout the body.

NCT00542230 · Official ClinicalTrials.gov record · National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

RecruitingNot a traditional drug phaseBethesda, Maryland
Studies of Skin Microbes in Healthy People and in People With Skin Conditions

This study will examine microbes (e.g., bacteria, fungi, viruses) that live on human skin and how microbes contribute to health and disease. It will analyze healthy human skin and how the these microorganisms might change in patients with atopic dermatitis (AD), a skin condition also known as eczema.

NCT00605878 · Official ClinicalTrials.gov record · National Human Genome Research Institute (NHGRI)

RecruitingNot a traditional drug phaseBethesda, Maryland
Clinical and Immunologic Monitoring of Patients With Known or Suspected HIV Infection

This study will investigate HIV infection and associated conditions by monitoring infected patients. The study will also serve as a means for recruiting HIV-infected individuals to NIAIDs ongoing clinical and laboratory studies and supporting the institute s infectious disease training program by providing Infectious Disease fellows with ongoing training in the management of HIV infection.

NCT00789009 · Official ClinicalTrials.gov record · National Institute of Allergy and Infectious Diseases (NIAID)

RecruitingNot a traditional drug phaseBethesda, Maryland
Comprehensive Multimodal Analysis of Neuroimmunological Diseases of the Central Nervous System

Inflammatory or degenerative diseases of the brain and spinal cord, such as multiple sclerosis, may be related to problems with an individual s immune system. However, more information is needed on the ways in which the cells of the immune system interact with the central nervous system (CNS).

NCT00794352 · Official ClinicalTrials.gov record · National Institute of Allergy and Infectious Diseases (NIAID)

RecruitingNot a traditional drug phaseBethesda, Maryland
Natural History Study of Monoclonal B Cell Lymphocytosis (MBL), Chronic Lymphocytic Leukemia/Small Lymphocy…

Background The development of new technologies now allow scientists to investigate the molecular basis and clinical manifestations of monoclonal B cell lymphocytosis (MBL), chronic lymphocytic leukemia(CLL)/small lymphocytic lymphoma (SLL), lymphoplasmacytic lymphoma (LPL)/Waldenstrom macroglobulinemia (WM), and splenic marginal zone lymphoma (SMZL). Applying these methods in a natural history study can help identify processes involved in disease progression, and possibly lead to the discovery or validation of treatment targets.

NCT00923507 · Official ClinicalTrials.gov record · National Heart, Lung, and Blood Institute (NHLBI)

RecruitingNot a traditional drug phaseLos Angeles, California
Not a traditional drug phase: Kidney Biopsy for Minimal Change Disease (MCD)

Minimal change disease (MCD), focal segmental glomerulosclerosis (FSGS), and Membranous nephropathy (MN), generate an enormous individual and societal financial burden, accounting for approximately 12% of prevalent end stage renal disease (ESRD) cases (2005) at an annual cost in the US of more than $3 billion. However, the clinical classification of these diseases is widely believed to be inadequate by the scientific community.

NCT01209000 · Official ClinicalTrials.gov record · University of Michigan

RecruitingNot a traditional drug phaseBoston, Massachusetts
National Pregnancy Registry for Psychiatric Medications

The National Pregnancy Registry for Psychiatric Medications is dedicated to evaluating the safety of psychiatric medications such as antidepressants, ADHD medications, sedative hypnotics, and atypical antipsychotics that many people take during pregnancy to treat a wide range of mood, anxiety, executive function, or psychiatric disorders. The goal of this Registry is to gather information on the safety of these medications during pregnancy, as current data is limited.

NCT01246765 · Official ClinicalTrials.gov record · Massachusetts General Hospital

RecruitingNot a traditional drug phaseBethesda, Maryland
Surgery as a Treatment for Medically Intractable Epilepsy

Background: \- Drug resistant epilepsy is the term used to describe epilepsy that cannot be controlled by medication. Many people whose seizures do not respond to medication will respond to surgical treatment, relieving seizures completely or almost completely in one-half to two-thirds of patients who qualify for surgery.

NCT01273129 · Official ClinicalTrials.gov record · National Institute of Neurological Disorders and Stroke (NINDS)

RecruitingNot a traditional drug phaseBethesda, Maryland
Cell Collection to Study Eye Diseases

Background: \- Best Vitelliform Dystrophy (Best disease), Late-Onset Retinal Degeneration (L-ORD), and Age-Related Macular Degeneration (AMD) all affect the retina, the light sensing area at the back of the eye. Doctors cannot safely obtain retinal cells to study these diseases.

NCT01432847 · Official ClinicalTrials.gov record · National Eye Institute (NEI)

RecruitingNot a traditional drug phaseBoston, Massachusetts
Not a traditional drug phase: Breast Cancer-Related Lymphedema Screening for Lymphedema

The primary objectives of this study are twofold: 1) to detect and determine the level of symptoms, functional disability, and changes in quality of life that breast cancer patients experience from changes in their arms during and after treatment for breast cancer by collecting patient reported outcome measures, objective measurements, and clinical information in a prospectively maintained database and 2) to improve breast cancer-related lymphedema outcomes by early detection using objective measurements and symptoms assessments and assess these outcomes by maintaining the data in a database in order to contribute to the literature. The secondary aim of this study is to assess extracellular fluid content in the upper extremity, breast, and/or trunk of patients treated for breast cancer before, during, and after treatment in order to better understand the role of bioimpedance spectroscopy in lymphedema screening.

NCT01521741 · Official ClinicalTrials.gov record · Massachusetts General Hospital

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