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PRIMARY ENDPOINT

Improved disease control

TAVNEOS-based regimen achieved non-inferior clinical remission at Week 26 and superior sustained clinical remission at Week 52 vs a GC-based regimen1*

At Week 26, a TAVNEOS-based regimen demonstrated non-inferiority in achieving clinical remission
vs a GC-based regimen1

p<0.001 for non-inferiority

(Difference 3.4, 95% CI, -6.0 to 12.8)

Efficacy
At Week 52, a TAVNEOS-based regimen demonstrated superior sustained clinical remission
vs a GC-based regimen1

p=0.007 for superiority

(Difference 12.5, 95% CI, 2.6 to 22.3)

Efficacy
symptoms

At Week 52, TAVNEOS-based regimen demonstrated a NNT between 8 and 10

SECONDARY ENDPOINT

Reduced risk of relapse

TAVNEOS-based regimen resulted in a lower absolute risk of relapse vs a GC-based regimen over 52 weeks1

Absolute risk of relapse over 52 weeks of treatment1

Reducing relapses
symptoms

Twice as many patients relapsed in the GC-based regimen vs the TAVNEOS-based regimen1

Reducing relapses

There was no pre-speci ed plan for adjustment of con dence intervals for multiplicity of the secondary end points; point estimates and 95% con dence intervals only are presented, and no de nite conclusions can be drawn from these data

TAVNEOS-based regimen demonstrated a 54% relative risk reduction in relapse vs a GC-based regimen over 52 weeks1

Efficacy

ADVOCATE study design

52 week, international, multicentre, active-comparator, randomised, double-blind, double-dummy, controlled, pivotal phase 3 study with patients assigned to receive TAVNEOS 30 mg twice daily (N=166) or prednisone tapering schedule for 20 weeks (60 mg per day tapered to discontinuation by Week 21) (N=164) on the top of either cyclophosphamide (followed by azathioprine) or rituximab.1

TAVNEOS-based regimen patients received NO study-supplied GCs. Patients in both regimens could use non-study supplied GCs throughout the 52-week study at their physician’s discretion for AAV worsening or non-AAV-related reasons. Non-study supplied GCs during the screening had to be tapered to ≤20 mg per day before entering the study, and further tapered to 0 mg by the end of Week 4 of the study.4

Reducing relapses
Inclusion criteriaExclusion criteria
  • ≥12 years old*
  • Newly-diagnosed or relapsing GPA or MPA according to Chapel Hill Consensus Conference definitions
  • Indicated for RTX or CYC treatment
  • Either MPO+ or PR3+
  • Estimated eGFR of ≥15 mL/min/1.73m2
  • At least one major or 3 non-major items, or at least two renal items of haematuria and proteinuria on BVAS
  • Alveolar haemorrhage requiring invasive pulmonary ventilation anticipated to last beyond screening
  • Any other multisystem autoimmune disease
  • Coagulopathy or bleeding disorder
  • Required dialysis or plasma exchange within 12 weeks prior to screening
  • A kidney transplant
  • Had received CYC within 12 weeks prior to screening, RTX within 12 months prior to screening (or 6 months with B cell reconstitution, CD19 count >0.01x109/L), cumulative dose of IV GCs >3 g within 4 weeks, or oral GCs of >10 mg per day prednisone (or equivalent) for >6 weeks continuously prior to screening

*Adult and adolescent GPA/MPA patients participated in this study. For additional details, visit clinicaltrials.gov, study code: NCT02994927

 TAVNEOS-BASED REGIMEN (n=166)GC-BASED REGIMEN (n=164)
AGE (mean±SD)61.2±14.660.5±14.5
MALE no. (%)98 (59.0)88 (53.7)
GRANULOMATOSIS WITH POLYANGIITIS no. (%)91 (54.8)90 (54.9)
MICROSCOPIC POLYANGIITIS no. (%)75 (45.2)74 (45.1)
RELAPSED PATIENTS no. (%)51 (30.7)50 (30.5)
NEWLY DIAGNOSED PATIENTS no. (%)115 (69.3)114 (69.5)
BVAS SCORE no. (%)16.3±5.916.2±5.7
GC USE DURING SCREENING PERIOD no. (%)125 (75.3)135 (82.3)

ORGAN INVOLVEMENT no. (%)

  • RENAL
  • EARS, NOSE, AND THROAT
  • CHEST
  • 134 (80.7)
  • 75 (45.2)
  • 71 (42.8)
  • 134 (80.7)
  • 75 (45.2)
  • 71 (42.8)
 TAVNEOS-BASED REGIMEN (n=166)
AGE (mean±SD)61.2±14.6
MALE no. (%)98 (59.0)
GRANULOMATOSIS WITH POLYANGIITIS no. (%)91 (54.8)
MICROSCOPIC POLYANGIITIS no. (%)75 (45.2)
RELAPSED PATIENTS no. (%)51 (30.7)
NEWLY DIAGNOSED PATIENTS no. (%)115 (69.3)
BVAS SCORE no. (%)16.3±5.9
GC USE DURING SCREENING PERIOD no. (%)125 (75.3)

ORGAN INVOLVEMENT no. (%)

  • RENAL
  • EARS, NOSE, AND THROAT
  • CHEST
  • 134 (80.7)
  • 75 (45.2)
  • 71 (42.8)
 GC-BASED REGIMEN (n=164)
AGE (mean±SD)60.5±14.5
MALE no. (%)88 (53.7)
GRANULOMATOSIS WITH POLYANGIITIS no. (%)90 (54.9)
MICROSCOPIC POLYANGIITIS no. (%)74 (45.1)
RELAPSED PATIENTS no. (%)50 (30.5)
NEWLY DIAGNOSED PATIENTS no. (%)114 (69.5)
BVAS SCORE no. (%)16.2±5.7
GC USE DURING SCREENING PERIOD no. (%)135 (82.3)

ORGAN INVOLVEMENT no. (%)

  • RENAL
  • EARS, NOSE, AND THROAT
  • CHEST
  • 134 (80.7)
  • 75 (45.2)
  • 71 (42.8)
PrimaryOverview of results
Achievement of clinical remission (BVAS 0 and no GC use in previous 4 weeks)Non-inferior to GC-based regimen
(p<0.001 for non-inferiority)
Sustained remission at Week 52,defined as clinical remission at Week 26
through to Week 52
Superior to GC-based regimen
(p=0.007 for superiority)
SecondaryOverview of results
Change in GC-related toxicity during first 26 weeks according to the GTISignificant reduction in GTI-CWS at Week 26
(p=0.0002); significant reduction in GTI-AIS at
Week 26 (p=0.008) vs GC-based regimen
BVAS 0 at Week 4Similar number of patients achieved BVAS 0 at
Week 4 in both treatment groups
Change in health-related QoL scores over 52 weeks as measured by SF-36v2 and EuroQoL-5D-5LSignificant improvements in physical QoL (p=0.002 at Week 26 and p=0.018 at Week 52) and health-related QoL* vs GC-based regimen. Numerical improvement in mental QoL
In patients with renal disease at baseline, change over 52 weeks in eGFR, UACR and MCP-1:creatinine ratioMeaningful improvements in renal function at Week 52 (p=0.029), significant reduction in UACR at Week 4 (p<0.0001); numerically greater reduction in MCP-1:creatinine ratio at Week 52 vs GC-based regimen
Relapse (BVAS >0) assessed in a time-to-event analysis54% relative reduction in relapse risk over 52
weeks vs GC-based regimen
Cumulative organ damage (VDI)Numerically similar change in VDI from baseline across both treatment groups

There was no pre-specified plan for adjustment of confidence intervals for multiplicity of the secondary end points; point estimates and 95% confidence intervals only are presented, and no definite conclusions can be drawn from these data

*Health-related QoL was measured using two scores: EQ-5D-5L VAS score and EQ-5D-5L index. Significant improvements in EQ-5D-5L VAS score were observed in the TAVNEOS-based regimen at Week 26 (p=0.05) and Week 52 (p=0.002) vs GC-based regimen. With the EQ-5D-5L index, numerical improvements were observed at Week 26, and significant improvements were observed at Week 52 (p=0.009) in the TAVNEOS-based regimen vs GC-based regimen5

SECONDARY ENDPOINT

Sustained improvement in renal function over 1 year

TAVNEOS®-based regimen demonstrated meaningful improvements in eGFR1

Reducing relapses

Benefits especially marked in patients with lowest renal function at baseline1,6  

POST-HOC ANALYSIS

In patients with Stage 4 CKD (eGFR <30 mL/min/1.73 m2):1,6

mL/min/1.73 m2 eGFR increase in TAVNEOS®-based regimen (n=52) vs +8.2 mL/min/1.73 m2 in GC-based regimen (n=48) at Week 52 (p=0.005) (Difference 5.6, 95% CI, 1.7 to 9.5)

In patients with Stage 4/5 CKD (eGFR ≤20 mL/min/1.73 m2):6

mL/min/1.73 m2 eGFR increase in TAVNEOS®-based regimen (n=27) vs +7.7 mL/min/1.73 m2 in GC-based regimen (n=23) at Week 52 (p=0.003) (Difference 8.4, 95% CI, 2.9 to 13.8)

There was no pre-specified plan for adjustment of confidence intervals for multiplicity of the secondary end points; point estimates and 95% confidence intervals only are presented, and no definite conclusions can be drawn from these data

SECONDARY ENDPOINT

Reduced glucocorticoid toxicity

TAVNEOS®-based regimen demonstrated a significant reduction in GC toxicity1,4

reduction in GTI Cumulative Worsening Score (CWS) in TAVNEOS®-based regimen vs GC-based regimen at Week 26 1,4
Reducing relapses

Difference at Week 13: -11.0 (95% CI, -19.7 to -2.2)

Difference at Week 26: -16.8 (95% CI, -25.6 to -8.0)

GTI CWS increase as new toxicities are reported (e.g. worsening hypertension, infection) but do not decrease when improvements occurs 7
reduction in GTI Aggregate Improvement Score (AIS) in TAVNEOS®-based regimen vs GC-based regimen at Week 26 1,4
Reducing relapses

Difference at Week 13: -13.3 (95% CI, -22.2 to -4.4)

Difference at Week 26: -12.1 (95% CI, -21.1 to -3.2)

GTI AIS increase when toxicities are reported and decrease when improvement occurs 7

There was no pre-specified plan for adjustment of confidence intervals for multiplicity of the secondary end points; point estimates and 95% confidence intervals only are presented, and no definite conclusions can be drawn from these data

SECONDARY ENDPOINT

Improved quality of life

TAVNEOS®-based regimen demonstrated significant improvements in physical and health-related domains of QoL1,3,5

Significant improvements in physical QoL at Week 521,5§
Reducing relapses

Difference at Week 26: 3.10 (95% CI, 1.17 to 5.03)

Difference at Week 52: 2.35 (95% CI, 0.40 to 4.31)

Significant improvements in health-related QoL at Week 521,3**††
Reducing relapses

Difference at Week 26: 3.6 (95% CI, -0.1 to 7.2)

Difference at Week 52: 5.9 (95% CI, 2.3 to 9.6)

symptoms

ADVOCATE is the first study to show a significant difference in the QoL between treatment arms1,3,5,8–10

There was no pre-specified plan for adjustment of confidence intervals for multiplicity of the secondary end points; point estimates and 95% confidence intervals only are presented, and no definite conclusions can be drawn from these data

*Clinical remission in the ADVOCATE study was defined as a BVAS 0 and no glucocorticoid use in previous 4 weeks.1

The NNT was calculated using https://www.statology.org/confidence-interval-difference-in-proportions-calculator/ to determine the confidence intervals for crude difference in proportions. At Week 52, the response rates were 65.7% in the TAVNEOS-based regimen and 54.9% in the GC-based regimen. This led to a crude result of NNT = 1/(0.657-0.549) = 9.26, rounded to 10 patients. Using the adjusted model and the estimated common difference, the NNT = 1/0.125 = 8. In conclusion, the NNT is between 8 and 10 patients at Week 52.1

A numerical improvement was seen in mental QoL.5

§With the EQ-5D-5L index, numerical improvements were observed at Week 26, and significant improvements were observed at Week 52 (p=0.009) in the TAVNEOS-based regimen vs GC-based regimen.5

AAV, ANCA-associated vasculitis; AIS, aggregate improvement score; ANCA, anti-neutrophil cytoplasmic antibody; BVAS, Birmingham Vasculitis Activity Score; CD19, cluster of differentiation 19; CI, confidence interval; CKD, chronic kidney disease; CWS, Cumulative Worsening Score; CYC,, cyclophosphamide; eGFR,, gestimated glomerular filtration rate; EQ-5D-5L, EuroQol 5-dimension 5-level; GC, glucocorticoid; IV, intravenous; MCP-1, monocyte chemoattractant protein-1; MOA, mechanism of action; MPA, microscopic polyangiitis; MPO, myeloperoxidase; NNT, number-needed-to-treat; PR3, proteinase-3; QoL, quality of life; UACR, urine albumin-to-creatinine ratio; VAS, Visual Analogue Scale; VDI Vasculitis Damage Index.

1. Jayne D, et al. N Eng J Med 2021; 384(7): 599–609. 2. TAVNEOS EU SmPC January 2022. 3. Bekker P, et al. PLoS One 2016;11(10):e0164646 4. Jayne D, et al. N Engl J Med 2021;384(7):599–609. [Supp Appendix]. 5. Vifor Pharma (2020). Data on File. 6. Jayne D, et al. J Am Soc Nephrol 2021:32 7. NHS (2019). Chronic Kidney Disease. Available at: https://www.nhs.uk/conditions/kidney-disease/diagnosis/. Date accessed: March 2023. 8. Cortazar F, et al. Kidney Int Rep 2023. Available at: https://doi.org/10.1016/j.ekir.2023.01.039. Date accessed: March 2023. 9. Stone J, et al. Semin Arthritis Rheum 2022;55:152010. 10. McDowell P, et al. J Allergy Clin Immunol Pract 2021;9(1):365–72. 11. Stone JH, et al. N Engl J Med 2010;363(3):221–32. 12. Walsh M, et al. N Engl J Med 2020;382(7):622–31. 13. Charles P, et al. Ann Intern Med 2020;173(3):179–87.