E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
|
E.1.1.1 | Medical condition in easily understood language |
Factor VIII level less than 1% of normal |
|
E.1.1.2 | Therapeutic area | Diseases [C] - Blood and lymphatic diseases [C15] |
MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 14.1 |
E.1.2 | Level | LLT |
E.1.2 | Classification code | 10018937 |
E.1.2 | Term | Haemophilia A |
E.1.2 | System Organ Class | 100000004850 |
|
E.1.3 | Condition being studied is a rare disease | Yes |
E.2 Objective of the trial |
E.2.1 | Main objective of the trial |
To compare efficacy and safety of standard weight based Factor VIII prophylaxis with individually tailored pharmacokinetically based FVIII prophylaxis |
|
E.2.2 | Secondary objectives of the trial |
To compare the number of clinically significant bleeds and
factor VIII usage in patients who are taking:
a. Prophylaxis prescribed according to routine clinical practice
with
b. Prophylaxis prescribed on alternate days to maintain
predicted target trough of ≥1.5IU/dL based on sparse blood
sampling and Bayesian pharmacokinetic estimation
2) Compare the rate of all haemarthroses and soft
tissue bleeds between the two regimens
3) To compare the number of clinically evident joint
bleeds with any MRI joint changes and Pettersson
scores
4) Establish the intra-patient variability of pharmacokinetic
parameters over time by a population pharmacokinetic
method
5) Establish the accuracy of factor VIII levels predicted
from studies using sparse (2-3 blood sample) data,
versus measured factor VIII levels in patients on
prophylaxis and to investigate patient-related variables
that affect factor VIII pharmacokinetics |
|
E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
Inclusion criteria:
• Severe Haemophilia A (baseline Factor VIII level of <1 IU/dL)
• Age 18 years and above
• Patients taking any regular prophylactic regimen (defined
as regular factor VIII infusions, at least 5 times a fortnight, with the aim of minimising haemarthroses and other clinically significant bleeds).
• Low titre inhibitors, past history of an inhibitor, abnormal liver function, drugs that interfere with haemostasis and low CD4 counts are allowed.
|
|
E.4 | Principal exclusion criteria |
• Presence of a target joint on prophylaxis (defined as 3 bleeds into one joint, during a 6 month period, during the last year).
• The occurrence of more than 3 haemarthroses in the last year which required more than 2 infusions to resolve.
• Pregnant or breastfeeding women
• Patients with a learning disability or dementia
• Prisoners
• Adults who are unconscious/unable to give informed consent
• Participants with a pacemaker or implanted medical devices which are unsuitable to have a MRI will be excluded from the MRI scans during the trial but may proceed with other components.
|
|
E.5 End points |
E.5.1 | Primary end point(s) |
Number of bleeding events experienced while on standard and Pk tailored prophylaxis |
|
E.5.1.1 | Timepoint(s) of evaluation of this end point |
|
E.5.2 | Secondary end point(s) |
1. The factor VIII usage
2. The total number of all haemarthroses and soft tissue bleeds
3. Quality of life (EQ5D)
4. Patients’ joint status (HJHS), MRI joint score (IPSG score ) and Pettersson score
5. The accuracy of factor VIII levels predicted from studies using sparse (2-3 blood sample) data, versus measured factor VIII levels in patients on prophylaxis
6. The intra-patient variability of pharmacokinetic parameters over time, as estimated by a population pharmacokinetic method
|
|
E.5.2.1 | Timepoint(s) of evaluation of this end point |
|
E.6 and E.7 Scope of the trial |
E.6 | Scope of the trial |
E.6.1 | Diagnosis | No |
E.6.2 | Prophylaxis | Yes |
E.6.3 | Therapy | No |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | Yes |
E.6.6 | Pharmacokinetic | Yes |
E.6.7 | Pharmacodynamic | No |
E.6.8 | Bioequivalence | No |
E.6.9 | Dose response | No |
E.6.10 | Pharmacogenetic | No |
E.6.11 | Pharmacogenomic | No |
E.6.12 | Pharmacoeconomic | No |
E.6.13 | Others | No |
E.7 | Trial type and phase |
E.7.1 | Human pharmacology (Phase I) | No |
E.7.1.1 | First administration to humans | No |
E.7.1.2 | Bioequivalence study | No |
E.7.1.3 | Other | No |
E.7.1.3.1 | Other trial type description | |
E.7.2 | Therapeutic exploratory (Phase II) | No |
E.7.3 | Therapeutic confirmatory (Phase III) | No |
E.7.4 | Therapeutic use (Phase IV) | Yes |
E.8 Design of the trial |
E.8.1 | Controlled | Yes |
E.8.1.1 | Randomised | No |
E.8.1.2 | Open | No |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | No |
E.8.1.5 | Parallel group | No |
E.8.1.6 | Cross over | Yes |
E.8.1.7 | Other | No |
E.8.2 | Comparator of controlled trial |
E.8.2.1 | Other medicinal product(s) | No |
E.8.2.2 | Placebo | No |
E.8.2.3 | Other | Yes |
E.8.2.3.1 | Comparator description |
|
E.8.2.4 | Number of treatment arms in the trial | 2 |
E.8.3 |
The trial involves single site in the Member State concerned
| Yes |
E.8.4 | The trial involves multiple sites in the Member State concerned | No |
E.8.5 | The trial involves multiple Member States | No |
E.8.6 Trial involving sites outside the EEA |
E.8.6.1 | Trial being conducted both within and outside the EEA | No |
E.8.6.2 | Trial being conducted completely outside of the EEA | No |
E.8.7 | Trial has a data monitoring committee | Yes |
E.8.8 |
Definition of the end of the trial and justification where it is not the last
visit of the last subject undergoing the trial
|
|
E.8.9 Initial estimate of the duration of the trial |
E.8.9.1 | In the Member State concerned years | 2 |
E.8.9.1 | In the Member State concerned months | 6 |
E.8.9.1 | In the Member State concerned days | |