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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT05659719
Other study ID # C4181010
Secondary ID
Status Completed
Phase
First received
Last updated
Start date October 19, 2022
Est. completion date May 16, 2023

Study information

Verified date July 2023
Source Pfizer
Contact n/a
Is FDA regulated No
Health authority
Study type Observational

Clinical Trial Summary

The purpose of this study is to learn about the study medicine (called recifercept) in people with achondroplasia. Achondroplasia is a very rare disease and patients of achondroplasia have short arms and legs. The study will include data already collected from a recifercept clinical trial and data collected from a separate study of achondroplasia. This study will compare patient experiences and will help the investigators determine if the study medicine, recifercept, is effective.


Recruitment information / eligibility

Status Completed
Enrollment 250
Est. completion date May 16, 2023
Est. primary completion date May 16, 2023
Accepts healthy volunteers No
Gender All
Age group 3 Months to 15 Years
Eligibility Inclusion Criteria: - All patients from Study C4181005 who have completed Visits 1 through 11 (at D183) will be included in this project. To construct a concurrent external control, patients from Study C4181001 will need to meet the following inclusion criteria from Study C4181005 to be eligible for inclusion: - Documented, confirmed genetic diagnosis of achondroplasia from historical medical records (test must have been performed at a laboratory fully accredited for genetic testing under local regulations) - Aged = 3 months to <11 years (up to the day before 11th birthday inclusive) at time of enrollment into the observational natural history study. - Havecompleted at least 2 valid height/length measurements (at least 3 months apart) - Assessed for Tanner stage 1 during physical examination before or at enrollment (must include assessment of breast development for females, testicular stage for males) - Able to stand independently for height measurements (if = 2 years of age at enrollment); If aged <2 years at enrollment, has a documented historical MRI brain/cervical spine performed in the previous 12 months. - Have at least 6 months of available follow-up data after enrollment into the natural history study Exclusion Criteria: - Patients meeting any of the following criteria will not be included in the study: - Presence of severe obesity (BMI>95% percentile on Hoover-Fong BMI charts); - Body weight <7kg or >30kg - History of chronic kidney disease (CKD) or renal impairment - History of receipt of any treatment that are known to potentially affect growth (including oral steroids > 5 days in the last 6 months before enrollment, high dose inhaled corticosteroids (>800 mcg/day beclametasone equivalent) and medication for attention deficient hyperactivity disorder. - Less than 6 months since fracture or surgical procedure of any bone determined from the baseline visit date. - Presence of any internal guided growth plates/devices - History of removal of internal guided growth plates/devices within 6 months prior to enrollment

Study Design


Related Conditions & MeSH terms


Intervention

Other:
Recifercept
Patients received recifercept intervention in the phase 2 clinical trial

Locations

Country Name City State
United States Pfizer New York New York

Sponsors (1)

Lead Sponsor Collaborator
Pfizer

Country where clinical trial is conducted

United States, 

Outcome

Type Measure Description Time frame Safety issue
Primary Height growth Increase in height growth above expected growth in reference population, defined as the height growth in the achondroplasia reference population +50% 6 months
Secondary Standing height standing height in centimeters 6 months
Secondary Sitting height sitting height in centimeters 6 months
Secondary Knee height knee height in centimeters 6 months
Secondary Arm span arm span in centimeters 6 months
Secondary Length of the legs length of the legs in centimeters 6 months
Secondary Sitting height to standing height ratio sitting height to standing height ratio (unitless) 6 months
Secondary arm span to height or length difference arm span to height or length difference in centimeters 6 months
Secondary knee height to low segment ratio knee height to low segment ratio (unitless) 6 months
Secondary Achondroplasia-related orthopaedic complications lordosis, kyphoscoliosis, small foramen magnum, spinal stenosis 6 months
Secondary Other chondroplasia-related complications sleep disordered breathing, acute otitis media, hydrocephalus 6 months
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