Clinical trials: Prevalence
Schizophrenia, Drug Abuse
A Pilot, Proof-of-concept Cohort Study of the Prevalence of Comorbid Mental Illness and Substance Abuse
The prevalence estimates for specific mental disorders and illicit drugs have been separately reported in U.S. government surveys.
- Conditions
- Schizophrenia, Drug Abuse, Anxiety Disorder, Bipolar Disorder
- Trial name
- NCT02476877
- Where
- United States
- Volunteers
- 75 people
- Sponsor
- Advanced Clinical Laboratory Solutions, Inc.
Non-Small Cell Lung Cancer
A Study of Prevalence of EGFR Mutations in Participants With NSCLC
This is a non-interventional, local, multicenter, cross-sectional study to determine the prevalence of epidermal growth factor receptor (EGFR) mutations in participants diagnosed with non-squamous non-small cell lung cancer…
- Trial name
- NCT02695849
- Where
- 2 sites in Jordan
- Volunteers
- 69 people
- Sponsor
- Hoffmann-La Roche
Glaucoma
Prevalence of Ocular Surface Disease in Glaucoma Patients
Demographic information and a brief medical and concomitant medicine history will be obtained from the glaucoma patient's records. Qualified patients will be asked to complete a questionnaire about their symptoms.
- Trial name
- NCT00382122
- Where
- United States
- Volunteers
- 101 people
- Sponsor
- Alcon Research
Chronic Obstructive Pulmonary Disease, Noninvasive Ventilation
Determination of the Prevalence and Severity of Expiratory Flow Limitation in Chronic Obstructive Pulmonary Disease Patients
Expiratory Flow Limitation (EFL) occurs when the airways become compressed, which usually results when the pressure outside the airway exceeds the pressure inside the airway.
- Trial name
- NCT03851510
- Testing
- Vector ventilator, Resmon Pro
- Where
- United States
- Volunteers
- 57 people
- Sponsor
- Philips Respironics
Congenital Sucrase-isomaltase Deficiency (CSID)
Congenital Sucrase-Isomaltase Deficiency (CSID) Genetic Prevalence Study (GPS)
Congenital sucrose-isomaltase deficiency (CSID) is a rare, genetic disease in which mutations in the sucrose-isomaltase (SI) gene cause digestion problems of sucrose resulting in diarrhea and abdominal pain.
- Trial name
- CSID GPS (NCT01914003)
- Where
- 19 sites in United States
- Volunteers
- 53 people
- Sponsor
- QOL Medical, LLC
Locally Advanced or Metastatic NSCLC
Asia PDL1 Study Among NSCLC Patients
MEDI-APEX is a non-interventional, retrospective, cohort study to characterize PD-L1 expression and to assess the clinical characteristics and outcomes among NSCLC patients
- Trial name
- MEDI-APEX (NCT03037086)
- Where
- 4 sites in China, Japan and 1 more
- Volunteers
- 658 people
- Sponsor
- AstraZeneca
Psoriasis, Psoriatic Arthritis
Prevalence of Psoriatic Arthritis in Adults With Psoriasis: An Estimate From Dermatology Practice
This is a phase 4, multicenter, randomized, non-therapeutic interventional trial in subjects with psoriasis looking for the prevalence of psoriatic arthritis.
- Trial name
- PREPARE (NCT01147874)
- Testing
- lab draws and imaging
- Where
- 45 sites in United States, Belgium and 5 more
- Volunteers
- 1,013 people
- Sponsor
- Pfizer
Streptococcus Pneumoniae Infections
Prevalence of Nasopharyngeal Carriage of Streptococcus Pneumoniae in Healthy Children of 12-18 Months in 6 Cities, China
This study is to observe the carriage rate of Streptococcus pneumoniae (S.p.), Haemophilus influenzae Type B (Hib) and Moraxella catarrhalis (M.Cat.) in healthy Chinese children aged 12-18 months in order to estimate the…
- Trial name
- NCT00952367
- Testing
- Nasopharyngeal swab
- Where
- 6 sites in China
- Volunteers
- 3,641 people, healthy volunteers welcome
- Sponsor
- Wyeth is now a wholly owned subsidiary of Pfizer
Anemia
The Prevalence of Malaysian Children Aged ≥ 6 to ≤ 36 Months at Risk of Anaemia
The main purpose of this study is to determine the prevalence of Malaysian children aged ≥ 6 to ≤ 36 months at risk of anaemia by measuring Total Haemoglobin (SpHb) using a non-invasive haemoglobin assessment.
- Trial name
- NCT05181436
- Testing
- measuring Total Haemoglobin (SpHb) using Masimo Rad-67.
- Where
- Malaysia
- Volunteers
- 1,215 people, healthy volunteers welcome
- Sponsor
- Danone Specialized Nutrition (M) Sdn Bhd
Human Papillomavirus Infection
An Observational, Epidemiological Study on the Prevalence of Human Papillomavirus Types in Women in Egypt
The purpose of the study is to determine the Human Papillomavirus (HPV) prevalence and HPV type distribution among women aged >= 18 years, attending out-patient health services for gynaecological examination and who agree to HPV…
- Trial name
- NCT01158209
- Testing
- Endocervical samples
- Where
- 2 sites in Egypt
- Volunteers
- 490 people, healthy volunteers welcome
- Sponsor
- GlaxoSmithKline
Hepatitis D, Chronic
An Observational Study on the Prevalence of Chronic Hepatitis D in Romania and the Efficacy of Treatment With Pegasys (Peginterferon Alfa-2a)
This prospective, multicenter, observational study will assess the prevalence of chronic hepatitis D in patients with chronic hepatitis B in Romania and evaluate the efficacy of Pegasys (peginterferon alfa-2a) in patients with…
- Trial name
- NCT01861444
- Where
- Romania
- Volunteers
- 45 people, healthy volunteers welcome
- Sponsor
- Hoffmann-La Roche
Intestinal Bacteria Flora Disturbance
Multi-Antibiotic Resistance Carriage in Gut Flora
Prevalence Study evaluating the acquisition of carriage of multidrug-resistant Gram-negative bacteria (MDRGNB) in the gut flora in volunteers of French Armed Forces staying from 4 to 6 months outside France.
- Trial name
- MARC (NCT01591538)
- Where
- France
- Volunteers
- 272 people, healthy volunteers welcome
- Sponsor
- Da Volterra
Pulmonary Disease, Chronic Obstructive
Airway Limitation Study: Study In Primary Care Centers Of Chronic Bronchitis In Long-Term Cigarette Smokers Of At Least 40 Years Of Age With Symptoms Of Cough And Shortness Of Breath
The study does not involve testing of a drug (no treatment intervention). The study will will use spirometry (breathing tests) in subjects of 40 years of age and older with a history of cigarette smoking with chronic bronchitis…
- Trial name
- NCT00442468
- Testing
- Non-interventional study.
- Where
- 47 sites in United States
- Volunteers
- 1,283 people
- Sponsor
- GlaxoSmithKline
Hemophilia A, Hemophilia B
Global Epidemiologic Study of Preexisting Immunity to AAV in Adults With Severe Hemophilia
Assess the seroprevalence of neutralizing antibodies (NAb) to AAV in adults with severe hemophilia A (coagulation factor VIII [FVIII] <1%) or moderately severe to severe hemophilia B (coagulation factor IX [FIX] ≤2%).
- Trial name
- NCT03185897
- Testing
- Non-treatment, seroprevalence
- Where
- 23 sites in United States, Austria and 4 more
- Volunteers
- 242 people
- Sponsor
- Baxalta now part of Shire
Prostate Cancer
Treatment Approaches and Biomarkers PRevalence In de Novo MEtastatic Hormone-sensitive Prostate Cancer in Russian Federation
A multicentre observational study on treatment approaches and biomarkers in de novo metastatic hormone sensitive prostate cancer in Russian Federation
- Trial name
- PRIME (NCT07146113)
- Where
- 16 sites in Russia
- Volunteers
- 400 people
- Sponsor
- AstraZeneca
Breast Cancer
UNFOLD Study Egypt
Breast cancer is a major public health concern worldwide. In Egypt, it was the most diagnosed cancer among females in 2020 with an incidence rate of 32.4%.
- Trial name
- NCT06188494
- Where
- 7 sites in Egypt
- Volunteers
- 405 people
- Sponsor
- AstraZeneca
Upper GIT Symptoms
Prevalence of Gastroesophageal Reflux Disease (GERD) in Patients With Upper Gastrointestinal Track (GIT) Symptoms in Thailand
This is a prospective , epidemiological, multi-centre, phase IV study, approximately 5,000 patients who suffer with upper gastrointestinal tract symptoms. Each patient will be assessed for GERD with GerdQ Thai Version.
- Trial name
- GerdQ (NCT00999063)
- Where
- 25 sites in Thailand
- Volunteers
- 4,108 people
- Sponsor
- AstraZeneca
Colorectal Neoplasms
Prevalence of the Mutational Status of V-Ki-ras2 Kirsten Rat Sarcoma Viral Oncogene Homolog (KRAS) in Metastatic Colorectal Cancer (mCRC) in Argentine Patients
This observational, prospective, multicentric study is being conducted to record the prevalence of KRAS mutations in the Argentine mCRC population.
- Trial name
- NCT01082757
- Where
- Argentina
- Volunteers
- 1,524 people
- Sponsor
- Merck KGaA, Darmstadt, Germany
Hyperkalemia, Hemodialysis
Hyperkalaemia Prevalence, Recurrence and Treatment in Haemodialysis
The objective of this study is to evaluate the prevalence and recurrence of Hyperkalaemia (HK) in Chinese HD patients and to understand the treatment pattern of HK in China.
- Conditions
- Hyperkalemia, Hemodialysis, Water-Electrolyte Imbalance
- Trial name
- PRECEDE-K (NCT04799067)
- Testing
- observational study
- Where
- 12 sites in China
- Volunteers
- 600 people
- Sponsor
- AstraZeneca
Menopausal Symptoms, Physical Activity and Sedentary Behavior
Prevalence of Menopause-associated Symptoms Throughout the Menopausal Transition in Women Aged 40 to 70 Residing in Spain and Its Relationship With Physical Activity - MdH Study
The goal of this observational study is to learn about menopause-related symptoms in women aged 40 to 70 years who live in Spain.
- Trial name
- NCT07596069
- Testing
- Reproductive stage, Physical Activity Level
- Where
- 2 sites in Spain
- Volunteers
- 15,000 people, healthy volunteers welcome
- Sponsor
- Cuerpos Serranos S.L.