2026 data ClinicalTrials.gov official source

Conditions: O

Every condition beginning with O that has a registered US clinical trial, with how many studies cover each.

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820 conditions starting with "O"

Showing 1–50 of 820

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Condition Trials
OA 1
OAG - Open-Angle Glaucoma 1
OAT 1
OAV Syndrome 1
OAVS 1
Obese 28
Obese Adolescents 3
Obese But Otherwise Healthy Participants 3
Obese Children and Adolescents 1
Obese Diabetics 1
Obese or Overweight Healthy Volunteers 1
Obese Patients 3
Obese Patients (BMI ≥ 30 kg/m²) 2
Obese Patients With Non-alcoholic Steatohepatitis (NASH) 1
Obese, Otherwise Healthy Volunteers 1
Obesity 1,057
Obesity & Overweight 29
Obesity (Body Mass Index >30 kg/m2) 2
Obesity (Disorder) 6
Obesity and Diabetes Mellitus, Type 2 2
Obesity and Obesity-related Medical Conditions 14
Obesity and Overweight 28
Obesity and Type 2 Diabetes 6
Obesity Complicating Childbirth 2
Obesity Hypoventilation Syndrome (OHS) 2
Obesity in Children 2
Obesity in Diabetes 1
Obesity in Pregnancy 1
Obesity or Overweight 7
Obesity Prevention 14
Obesity Recidivism 2
Obesity Type 2 Diabetes Mellitus 2
Obesity With Diabetes 1
Obesity, Abdominal 3
Obesity, Adolescent 7
Obesity, Child 1
Obesity, Childhood 54
Obesity, Gliosis, Weight-Loss 1
Obesity, Maternal 1
Obesity, Metabolically Benign 1
Obesity, Mild 1
Obesity, Morbid 20
Obesity, Overweight, or Chronic Weight Management 2
Obesity, Pediatric 2
Obesity, Prediabetes 1
Obesity, Primary 2
Obesity, Severe 2
Obesity-Related Malignant Neoplasm 7
Obesity/Therapy 2
Obesity; Drug 1

Download the state trial statistics CSV cited on this page: clinicaltrials-gov-us-state-statistics.csv (ClinicalTrials.gov · CC0).

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Data sourced from official public datasets. See our methodology for details.