Personalized Medicine for Canadians With Hemophilia

Hemophilia A Clinical Trial

— PMCH  

Official title:

Personalized Medicine for Canadians With Hemophilia: a Pragmatic Evaluation of the Web-Accessible Population Pharmacokinetics Service- Hemophilia (WAPPS-Hemo) Tailored Dosing.

Clinical Trial Details — Status: Recruiting

Administrative data

• NCT number: NCT03615053
• Other study ID #: PMCH Study
• Status: Recruiting
• Phase: N/A
• Start date: July 24, 2019
• Est. completion date: September 30, 2023

Study information

• Verified date: March 2023
• Source: McMaster University
• Contact: Alfonso Iorio, MD, PhD, FRCPC
• Phone: 905-525-9140
• Email: iorioa[@]mcmaster.ca
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Performing an individual pharmacokinetic (PK) estimate is only the first step in implementing tailored prophylaxis, which requires using the PK profile information to design a personalized treatment regimen matching the treatment needs of individual patients. The overarching goal of WAPPS-Hemo is to provide an easy-to-use web application supporting all the steps needed to accomplish tailoring care of individual patients by matching their unique characteristics to the most appropriate treatment regimen, realizing the promise of personalized medicine.

This study will assess the impact of adopting population PK (popPK) based tailored prophylaxis in clinical practice, including proportion of patients eligible for tailoring, and encountered barriers. The impact on patient important outcomes and on societal outcomes, particularly financial impact, vs. current standardized regimens will be measured. It is hypothesized that WAPPS-Hemo, via estimation of precise individual PK profiles and by supporting the simulation of treatment regimens will:

1. improve or maintain patient important outcomes, while reducing wastage of factor concentrates; and

2. establish best practices and effective knowledge translation strategies for the implementation of personalized medicine.

Additionally, a solid base of data will be generated to model the bleeding risk of severe hemophilia A/B patients undergoing tailored prophylaxis which will enable evaluation of a combination of patient and treatment characteristics predictive of individual bleeding risk.

Description:

The PMCH study is a Canadian multicentre, open-label, historically-controlled clinical trial to evaluate the effects of implementing WAPPS-Hemo PopPK-based tailoring of hemophilia prophylaxis regimens using the tailoring dosing function of the WAPPS-Hemo system (WAPPS-Hemo clinical calculator).

The study start date at each centre are staggered by 1-3 months in a modified wedge-shaped design, to allow better differentiation of the effect of the intervention from unrelated but concomitant changes in other aspects of care in the Canadian landscape. Outcomes of interest will be measured for one year prior and for one year after the implementation of the WAPPS-Hemo regimen tailoring procedure.

The two main objectives of this study are:

1. Evaluate the applicability and effectiveness of WAPPS-Hemo PopPK-based tailoring of factor concentrate regimens.

2. Generate a solid base of data to model the bleeding risk of severe hemophilia A/B patients on prophylaxis, evaluating the contribution of patient and treatment characteristics to individual bleeding risk to be reduced by the tailored prophylaxis approach.

PMCH will objectively measure the impact of adopting a PopPK based tailoring of hemophilia treatment. The first goal will be minimizing the occurrence of bleeding events in the hemophilia population. The bleeding rate of Canadian hemophilia patients is still measurable at 2-4 spontaneous joint bleeds per year, which in turn reduce quality of life and consume health resources. It is expected that optimizing treatment goal and modalities will reduce this burden, or at least will not increase it, allowing the pursuit the second goal: minimize the use of resources and prompt a more equitable distribution of factor concentrates. For some patients, standard prophylaxis dosing leads to excessive use of concentrates. It is expected that a small but sizeable proportion of the patient population will be able to successfully reduce their factor concentrate consumption. The third goal will be to generate an evidence-based approach to identify the appropriate target goal(s) for individual patients by modelling the components of their risk of bleeding. Adopting a variable target threshold may enhance objective one and two, maximizing benefits with appropriate allocation of resources.

In addition to WAPPS-Hemo, the study will involve two other tools available to hemophilia treaters in Canada: the Canadian Bleeding Disorders Registry (CBDR) and Patient Reported Outcomes, Burdens and Experiences (PROBE) questionnaire. In particular, this study will leverage the integration of the three tools described above: WAPPS-Hemo, with its ability to generate PK estimates and use them to optimize treatment regiments; CBDR, already collecting most of the information needed to both generate and estimate optimal regimen recommendations for tailoring an individual regimen to meet specified treatment goals; and PROBE, to measure the impact on patient critical life experiences and outcome.

Recruitment information / eligibility

• Status: Recruiting
• Enrollment: 600
• Est. completion date: September 30, 2023
• Est. primary completion date: September 30, 2022
• Accepts healthy volunteers: No
• Gender: All
• Age group: 6 Years and older

Eligibility

Inclusion Criteria:

• individuals with severe congenital hemophilia A and B;

• on continuous factor prophylaxis;

• must be registered on CBDR (iCHIP in BC)

Exclusion Criteria:

• a history of explicit and documented previous treatment tailoring based on pharmacokinetic profiling;

• another congenital or acquired bleeding disorders other than Hemophilia A or B;

• active inhibitors (> 5 Bethesda units) or currently undergoing immune tolerance induction.

Related Conditions & MeSH terms

• Hemophilia A
• Hemophilia B

Intervention

Other:
• Implementation of WAPPS-Hemo personalized dosing regimen
Twelve months after enrollment in the study, WAPPS-Hemo will be used to calculate each patients individual pharmacokinetic estimate. Once completed, the WAPPS-Hemo clinical calculator will be used to calculate the optimal regimen based on individual needs.

Locations

Country	Name	City	State
Canada	University of Calgary	Calgary	Alberta
Canada	University of Alberta	Edmonton	Alberta
Canada	McMaster University	Hamilton	Ontario
Canada	McMaster University	Hamilton	Ontario
Canada	Queen's University	Kingston	Ontario
Canada	University of British Columbia	Vancouver	British Columbia
Canada	University of Manitoba	Winnipeg	Manitoba

Sponsors (1)

Lead Sponsor	Collaborator
McMaster University

Country where clinical trial is conducted

Canada, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Change in patient quality of life	Patient Reported Outcomes, Burdens and Experiences (PROBE) questionnaire. Scores range from 0-1, with a higher value indicating better health status.	Completed every 3-6 months for duration of the study, from enrollment to study completion.
Primary	Annualized Bleeding Rate (ABR) pre and post-tailoring implementation	ABR from the one year prior to WAPPS-Hemo tailoring to the one-year post-tailoring (absolute number of bleeds per year).	Recorded throughout the 2 year duration of the study as they occur.
Secondary	Change in physical activity	Patient Reported Outcomes, Burdens and Experiences (PROBE) questionnaire. Scores range from 0-1, with a higher value indicating better health status.	Completed every 3-6 months for duration of the study, from enrollment to study completion.
Secondary	Adherence to prescribed regimen	Measured by comparing the usage resulting from the prescribed regimen, the amount ordered for and dispensed to the patient and the amount logged on the treatment and bleeding diary.	Recorded throughout the 2 year duration of the study - frequency is as input by patient.
Secondary	Consumption of factor concentrates	Measured as change from the amount prescribed and used before and after the adoption of tailoring.	Recorded throughout the 2 year duration of the study - frequency as input by patient.
Secondary	Feasibility and acceptability of the WAPPS-Hemo based prophylaxis tailoring	Measured by proportion of cases with changes in prescribed regimens matching WAPPS-Hemo suggested regimens.	Recorded after 1 year at the time of tailoring implementation.
Secondary	Characteristics of reported bleeds	Assessed by exploring information including distribution and typology of joint bleeds as reported in the patient bleed and treatment logs.	Recorded throughout the 2 year duration of the study- frequency as input by patient.
Secondary	Assessment of the predictive performance of the WAPPS-Hemo clinical calculator	Measured by the comparison of predicted and observed post-infusion levels, when measured as part of routine clinical practice during the study period	Measured within routine clinical practice for 12 months post-tailoring implementation.
Secondary	Change in joint function	Measured by the Hemophilia Joint Health Score (HJHS). Scores range from 0-124, with higher values indicating poorer joint health.	Measured at study enrollment and at 2 years at study completion.