Ferri Grazzi, EnricoSun, Shawn X.Burke, TomO'Hara, Jamie2022-10-292022-10-292022-09-19Ferri Grazzi, E., Sun, S. X., Burke, T., & O'Hara, J. (2022). The impact of pharmacokinetic-guided prophylaxis on clinical outcomes and healthcare resource utilization in Hemophilia A patients: Real-world evidence from the CHESS II study. Journal of Blood Medicine, 13, 505-516. https://doi.org/10.2147/JBM.S36302810.2147/JBM.S363028http://hdl.handle.net/10034/627258Background: Using a pharmacokinetic (PK)-guided approach to personalize the dose and frequency of prophylactic treatment can help achieve and maintain targeted factor VIII (FVIII) trough levels in patients with hemophilia A. Objective: Investigate clinical and healthcare resource use outcomes in patients with hemophilia A treated with or without PK-guided prophylaxis using data from the Cost of Haemophilia in Europe: A Socioeconomic Survey (CHESS) II database. Methods: CHESS II was a cross-sectional, retrospective, burden-of-illness study incorporating data from eight European countries. Patients were eligible for this analysis if they were male, ≥18 years of age, and diagnosed with congenital hemophilia A of any severity. The clinical endpoints included annualized bleeding rate (ABR), presence and number of problem/target joints, and occurrence of joint surgeries. Healthcare resource utilization endpoints included the number of hematologist consultations and bleed-related hospitalizations or emergency department admissions. Data from November 2018 to October 2020 were included and were stratified according to treatment regimen and use of PK-guided dosing. Results: Altogether, 281 patients on prophylaxis had available FVIII trough level data. Mean (SD) age was 35.7 (13.8) years. A specific FVIII trough level was targeted in 120 (42.7%) patients and 47 (39.2%) received PK-guided dosing. Patients receiving PK-guided dosing had a mean (SD) ABR of 2.8 (2.1) and target joint number of 0.5 (0.7), compared with 3.9 (2.7) and 0.9 (1.4), respectively, for patients receiving non-PK-guided treatment. The mean (SD) number of hematologist consultations was 7.1 (5.3) for patients receiving PK-guided dosing versus 10.7 (5.7) for those who were not. A higher proportion of patients in the non-PK-guided group required hospitalization during their lifetime compared with the PK-guided group.<h4>Conclusion</h4>This analysis of real-world data suggests that PK-guided dosing for prophylaxis has a beneficial impact on clinical and healthcare resource utilization outcomes in patients with hemophilia A.Licence for this article: cc by-nchttps://creativecommons.org/licenses/by-nc/4.0/ProphylaxisHemophilia APersonalized TreatmentRecombinant Factor VIIIPk-guided DosingChess IIArticle1179-2736Journal of Blood Medicine2022-10-2913