Browse by Phase
N/A (Early Phase / Not Applicable) Clinical Trials
Browse currently recruiting N/A (Early Phase / Not Applicable) clinical trials registered on ClinicalTrials.gov.
Total Trials
6,771
Recruiting Now
6,771
Top Conditions in N/A (Early Phase / Not Applicable)
Frequently Asked Questions — N/A (Early Phase / Not Applicable) Trials
What does "N/A" mean for a clinical trial phase?
"N/A" or "Not Applicable" in the phase field indicates the trial does not follow the traditional Phase 1–4 drug development pathway. This applies to observational studies, epidemiological research, behavioral interventions, device studies, or exploratory work not yet assigned a formal phase. These studies are still registered on ClinicalTrials.gov and follow IRB-approved protocols.
Are N/A phase trials safe to participate in?
N/A phase trials encompass a wide range of study types, many involving minimal risk—such as observational studies, questionnaire-based research, or registry enrollment. Some may involve investigational devices or early-stage interventions. Review the trial's protocol, risks and benefits section, and informed consent documents carefully before enrolling. All ClinicalTrials.gov-registered studies must comply with applicable safety oversight requirements.
How do I find N/A phase trials for my condition?
Browse ClinicalMetric by condition to find all trials—regardless of phase—that are recruiting for a specific disease. Many N/A phase trials are observational or behavioral studies with fewer eligibility restrictions than phase-designated drug trials, making them more accessible to a broader range of participants.
Active N/A (Early Phase / Not Applicable) Studies
NCT06298682 N/A
Recruiting
Characterization of Exosomes Platelets-released
Condition
Platelet Thrombus
Enrollment
175 pts
Location
Italy
Sponsor
Centro Cardiologico Monzino
NCT06338696 N/A
Recruiting
Thailand ATTR-CM Registry
Condition
Transthyretin Amyloid Cardiomyopathy (ATTR-CM)
Enrollment
105 pts
Location
Thailand
Sponsor
Mahidol University
NCT07513662 N/A
Recruiting
Headache Education and Awareness vs. Daily Mindfulness Strategies - Understandin...
Condition
Migraine
Enrollment
72 pts
Location
United States
Sponsor
University of Colorado, Denver
NCT07143162 N/A
Recruiting
YOGA-FIT: Protocol for a Crossover Trial Investigating the Feasibility and Impac...
Condition
Stroke
Enrollment
40 pts
Location
Canada
Sponsor
Nova Scotia Health Authority
NCT06957288 N/A
Recruiting
The Effect of Mindfulness-Based Death Psychoeducation Program on Death Awareness...
Condition
Death Anxiety
Enrollment
30 pts
Location
Turkey (Türkiye)
Sponsor
Kastamonu University
NCT07848386 N/A
Recruiting
Patient Priorities Aligned Discrete Decision Making for Older Adults With Multip...
Condition
Hernia
Enrollment
80 pts
Location
United States
Sponsor
The University of Texas Health
NCT06823583 N/A
Recruiting
Multi-Site Feasibility Testing of the Ventricular Assist Device Anticipatory Gui...
Condition
Ventricular Assist Device
Enrollment
10 pts
Location
United States
Sponsor
Bryan Heart
NCT07810205 N/A
Recruiting
Prospective Longitudinal Cohort Study of Implant Age, Pocket Plane, Incision, Su...
Condition
Breast Implant Rupture
Enrollment
3,000 pts
Location
Colombia
Sponsor
Research Inc
NCT06953505 N/A
Recruiting
At Home Ammonia Monitoring of Inborn Errors of Ammonia Metabolism
Condition
Urea Cycle Disorders
Enrollment
30 pts
Location
United States
Sponsor
Sequitur Health Corp.
NCT07265518 N/A
Recruiting
Outpatient Induction of Labour Using a Double Balloon Transcervical Catheter in ...
Condition
Pregnant Women
Enrollment
258 pts
Location
France
Sponsor
Nantes University Hospital
NCT03180918 N/A
Recruiting
Male Fertility Preservation Using Cryopreservation of Testicular Tissue Before H...
Condition
Childhood Cancer
Enrollment
100 pts
Location
Switzerland
Sponsor
Gumy-Pause Fabienne
NCT06974890 N/A
Recruiting
Effects of Shuttle Balance Training on Balance , Gait and Postural Control in Ch...
Condition
Mild Cognitive Impairment
Enrollment
24 pts
Location
Pakistan
Sponsor
Riphah International Universit
NCT05632497 N/A
Recruiting
Alteration of Symbiosis Intestinal Microbiota on Patients With Anorexia Nervosa
Condition
Anorexia Nervosa
Enrollment
120 pts
Location
France
Sponsor
Assistance Publique - Hôpitaux
NCT07381504 N/A
Recruiting
Aerobic Exercise for Sleep in Children With ASD
Condition
Autism Spectrum Disorder
Enrollment
120 pts
Location
Taiwan
Sponsor
National Taiwan University Hos
NCT06760052 N/A
Recruiting
Longitudinal Data Registry of Plasma Cell Dyscrasia
Condition
Multiple Myeloma and Other Plasma Cell Neoplasms
Enrollment
2,000 pts
Location
China
Sponsor
Shanghai Zhongshan Hospital
NCT07842952 N/A
Recruiting
Cognitive-Function Informed Outpatient Child and Youth Mental Healthcare
Condition
Mental Health Care
Enrollment
215 pts
Location
Canada
Sponsor
Children's Hospital of Eastern
NCT06138249 N/A
Recruiting
Cholecalciferol and Calcifediol Are Both Useful to Improve Vitamin D Serum Level...
Condition
Hypovitaminosis D
Enrollment
90 pts
Location
Italy
Sponsor
Azienda Ospedaliero-Universita
NCT07728058 N/A
Recruiting
Dry Cord Care Versus Alcohol Cord Care in Healthy Newborns
Condition
Umbilical Cord Infection
Enrollment
210 pts
Location
Taiwan
Sponsor
Chang Gung Memorial Hospital
NCT07426848 N/A
Recruiting
OT SMILE: Occupational Therapy Group Intervention for Primary Brain Tumour Patie...
Condition
Primary Brain Tumour
Enrollment
96 pts
Location
Ireland
Sponsor
Royal College of Surgeons, Ire
NCT06766448 N/A
Recruiting
Effectiveness of Instrumental Rehabilitation in Patients With Adhesive Capsuliti...
Condition
Adhesive Capsulitis of the Shoulder
Enrollment
70 pts
Location
Morocco
Sponsor
Mohammed V Souissi University
NCT05339178 N/A
Recruiting
Quality of Life of Periodontitis Patients Visiting Supportive Periodontal Therap...
Condition
Quality of Life
Enrollment
300 pts
Location
Austria
Sponsor
Medical University of Vienna
NCT04723485 N/A
Recruiting
Evaluation Study: Obsessive-compulsive Disorders in Childhood and Young Adulthoo...
Condition
Obsessive-compulsive Disorder
Enrollment
625 pts
Location
Switzerland
Sponsor
Susanne Walitza
NCT07324343 N/A
Recruiting
Which Patient Group Shows Greater Improvement With Patient Education Alone in Ro...
Condition
Shoulder Pain Syndrome
Enrollment
116 pts
Location
Turkey (Türkiye)
Sponsor
Istanbul University - Cerrahpa
NCT06481943 N/A
Recruiting
A Prospective Research Investigation of Ischemia Using MCG
Condition
Acute Coronary Syndrome
Enrollment
335 pts
Location
United States
Sponsor
SB Technology, Inc.
NCT07034443 N/A
Recruiting
Functional Outcomes in Ulcerative Colitis Patients With Ileal Pouch Anal Anastom...
Condition
Fecal Incontinence
Enrollment
20 pts
Location
United States
Sponsor
Cedars-Sinai Medical Center
ClinicalMetric — Independent clinical trial intelligence platform. Not affiliated with NIH, ClinicalTrials.gov, the U.S. FDA, or any pharmaceutical company, hospital, or clinical research organization. Trial data is sourced from ClinicalTrials.gov for informational purposes only and does not constitute medical advice. Do not make any treatment, enrollment, or health decisions based solely on information found here — always consult a qualified healthcare professional. Full Disclaimer · Last Reviewed: November 2026 · Data Methodology