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Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.

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Official Title

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The purpose of this study is to evaluate the safety, effectiveness and pharmacokinetics of a study drug called Faslodex (fulvestrant) in the treatment of progressive precocious puberty (early puberty) in girls with McCune-Albright syndrome (MAS)

Faslodex in McCune Albright Syndrome

NCT ID

Patient Level Data

Therapeutic Area

Research Site

An Open-label, Non-Comparative Trial to Evaluate the Safety, Efficacy and Pharmacokinetics of Faslodex (fulvestrant) in Girls with Progressive Precocious Puberty Associated with McCune-Albright Syndrome

Change in the frequency of annualised days of vaginal bleeding during the 12 month treatment period compared to the 6 month baseline period, based on a worst-case scenario calculation .i.e. missing diary card days counted as bleeding days.

Percentage of participants with baseline vaginal bleeding who experienced ≥50% reduction in the number of vaginal bleeding days during the 12 month treatment period compared to the 6 month baseline period.

Percentage of participants with baseline vaginal bleeding who experienced cessation of vaginal bleeding for at least 180 consecutive days during the 12 month treatment period, based on a worst-case approach i.e. missing diary card days counted as bleeding days.

Percentage of participants with baseline vaginal bleeding who experienced cessation of vaginal bleeding for the full 12 month treatment period, based on a worst-case approach i.e. missing diary card days counted as bleeding days.

Change in the rate of increase in bone age from pre treatment (based on the 6 month retrospective visit) to the first 6 months of the treatment period. Bone age advancement for a particular time period was calculated as the increase in bone age over that time period adjusted (ie, normalized) for the length of that time period.

Change in the rate of increase in bone age from pre treatment (based on the 6 month retrospective visit) to the second 6 months of the treatment period. Bone age advancement for a particular time period was calculated as the increase in bone age over that time period adjusted (ie, normalized) for the length of that time period.

Change in the rate of increase in bone age from pre treatment (based on the 6 month retrospective visit) to the full 12 month treatment period. (Using last value carried forward method for the one patient who withdrew soon after their month 6 bone scan)  Bone age advancement for a particular time period was calculated as the increase in bone age over that time period adjusted (ie, normalized) for the length of that time period.

Change in growth velocity (annualised growth velocity.i.e. cm/y) from the pre treatment period to the first 6 months of the treatment period.  Growth velocity for a particular time period was calculated as the increase in height over that time period divided by the length of that time period (expressed in cm/year)

Change in growth velocity (annualised growth velocity i.e. cm/y) from the pre treatment period to the second 6 months of the treatment period. Growth velocity for a particular time period was calculated as the increase in height over that time period divided by the length of that time period (expressed in cm/year)

Change in growth velocity (annualised growth velocity i.e. cm/y) from the pre treatment period to the full 12 month treatment period.  Growth velocity for a particular time period was calculated as the increase in height over that time period divided by the length of that time period (expressed in cm/year)

Change from pre-treatment period to the first 6 months of the treatment period.  Z-score  is [(growth velocity from the previous visit to the current visit – mean) / standard deviation(SD)], where the mean and SD are from the National Center for Health Statistics, Fels study.

Change in growth velocity (Z-Score) from pre-treatment to the second 6 months of the treatment period.  Z-score  is [(growth velocity from the previous visit to the current visit – mean) / standard deviation(SD)], where the mean and SD are from the National Center for Health Statistics, Fels study.

Change in growth velocity (Z-Score) from pre-treatment to the full 12 month treatment period.  Z-score  is [(growth velocity from the previous visit to the current visit – mean) / standard deviation(SD)], where the mean and SD are from the National Center for Health Statistics, Fels study.

Uterine volume was calculated via ultrasound using the formula: 0.5(longitudinal multiplied by anteroposterior multiplied by transverse), if all 3 linear dimensions were recorded.  If all 3 linear dimensions were not recorded, uterine volume was not calculated.

Hormone assays: serum oestradiol at Screening visit (baseline), Month 12 of the treatment period.  Results presented relate to Month 12 of the treatment period.

Hormone assays: Luteinizing hormone (LH) at Screening visit (baseline), Month   12 of the treatment period.  Results presented relate to Month 12 of the treatment period.

Hormone assays: follicle-stimulating hormone (FSH)at Screening visit (baseline), Month 12 of the treatment period. Results presented relate to Month 12 of the treatment period..

Hormone assays: testosterone at  Screening visit (baseline), Month 12 of the treatment period.  Results presented relate to Month 12 of the treatment period..

Mean clearance is the average amount of Fulvestrant which is eliminated

Total apparent volume of distribution (Vss/F) is the total apparent volume in the body into which Fulvestrant distributes at equilibrium. Vss/F = V1/F + V2/F. V1/F is the volume of the 1st compartment and V2/F is the volume of the second compartment.  V1/F only is presented here. The measure of variability presented is the inter-individual error.

Total apparent volume of distribution (Vss/F) is the total apparent volume in the body into which Fulvestrant distributes at equilibrium. Vss/F = V1/F + V2/F. V1/F is the volume of the 1st compartment and V2/F is the volume of the second compartment.  V2/F only is presented here. The measure of variability presented is the inter-individual error.

Change in breast Tanner stage from baseline to Month 12/last visit.  Tanner stage (breast)  is a score of range 1-5 where 1=no development and 5=adult breast

Change in pubic Tanner stage from baseline to Month 12/last visit.  Tanner stage (pubic)  is a score of range 1-5 where 1=no development and 5=adult pubic hair

Change in PAH from baseline to Month 12/final visit for patients equal to or over 6 years of age.

McCune-Albright Syndrome(MAS) is caused by an activating mutation in the gene coding for the stimulatory subunit of the G protein, Gsα.  The altered Gsα causes autonomous activation of G-protein stimulated cAMP formation, which in the gonads, results in episodic uncontrolled sex steroid production and subsequent pubertal development.  For patients who provided separate specific informed consent, the percentage of patients with a Gsα mutation at screening was assessed by molecular analysis.

Faslodex in McCune Albright Syndrome - FMAS

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Medical condition

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Healthy volunteers

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Documents available

CSR-D6992C00044.pdf

Contacts

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Principal Investigator