Publications by authors named "Keystone E"

Introduction: ORAL Surveillance, a post-authorisation safety study of patients with rheumatoid arthritis (RA) enriched for cardiovascular (CV) risk, demonstrated increased risk of major adverse CV events (MACE) and malignancies (excluding non-melanoma skin cancer [NMSC]) for tofacitinib versus tumour necrosis factor inhibitors (TNFi). This analysis of a real-world Canadian observational study evaluated tofacitinib safety/effectiveness in patients meeting or not meeting CV risk criteria.

Methods: CANTORAL included patients with moderate-to-severe RA initiating tofacitinib (10/2017-07/2020; N = 504).

View Article and Find Full Text PDF
Article Synopsis
  • The study aimed to show that CT-P47 is as effective as the EU-approved tocilizumab (r-TCZ) in treating rheumatoid arthritis (RA) patients.
  • Conducted as a double-blind, phase III trial, 471 patients were randomized to receive either CT-P47 or r-TCZ, with efficacy measured primarily through changes in Disease Activity Score at specified weeks.
  • Results indicated that both treatments had similar efficacy, pharmacokinetics, safety, and immunogenicity profiles, confirming CT-P47's equivalence to r-TCZ even after patients switched from r-TCZ to CT-P47.
View Article and Find Full Text PDF

CT-P47 is a candidate biosimilar of tocilizumab. This 12-week, randomized, double-blind, parallel-design, phase 1 study aimed to demonstrate pharmacokinetic (PK) equivalence of CT-P47 and reference tocilizumab. Participants were healthy Japanese adults aged 18-55 years.

View Article and Find Full Text PDF

Background: This study compared the pharmacokinetics (PK), immunogenicity, and safety of candidate tocilizumab biosimilar, CT-P47, administered via auto-injector (CT-P47 AI) or pre-filled syringe (CT-P47 PFS), in healthy Asian adults.

Research Design And Methods: In this phase I, multicenter, open-label study, participants were randomized 1:1 to receive a single 162 mg/0.9 mL dose of CT-P47 via AI or PFS.

View Article and Find Full Text PDF

Objective: Hypertension (HTN) is a common comorbidity in RA. This study aimed to explore the prevalence and incidence of HTN and baseline factors associated with incident HTN in early RA (ERA).

Methods: Data were from the Canadian Early Arthritis Cohort (CATCH), an inception cohort of ERA patients having <1 year of disease duration.

View Article and Find Full Text PDF

Objectives: Standard criteria for measuring treatment efficacy in patients with rheumatoid arthritis (RA) include American College of Rheumatology (ACR) response rates, which require meeting a threshold of ≥20/50/70% improvement in several physician- and patient-reported measures. We aimed to evaluate the impact of csDMARDs, TNF inhibitors (TNFi), and tofacitinib (TOFA) on ACR components in real-life practice.

Methods: Clinical data of RA patients with a CDAI >10 at the time they started a treatment were pooled from two registries: Ontario Best Practices Research Initiative (OBRI) and RHUMADATA.

View Article and Find Full Text PDF

Background/objective: In patients with rheumatoid arthritis (RA), high tender-swollen joint differences (TSJDs) have been associated with worse outcomes. A better understanding of the phenotype and impact of high TSJD on patient-reported outcomes (PROs) in early RA may lead to earlier personalized treatment targeting domains that are important to patients today. Our objectives were to evaluate the impact of TSJD on updated PROs in patients with early RA over 1 year and to determine differences in associations by joint size.

View Article and Find Full Text PDF

Objective: Patients with early rheumatoid arthritis (RA) may present with more tender than swollen joints, which can persist. Elevated tender-swollen joint difference (TSJD) is often challenging, because there may be multiple causes and it may contribute to overestimating disease activity. Little is known about the phenotype and impact of TSJDs on patient function.

View Article and Find Full Text PDF

Background: The type of failure may predict response to a second biologic. We evaluated the response to a second tumor necrosis factor inhibitor (TNFi) or non-TNFi in patients failing their initial TNFi, either primarily or secondarily.

Methods: Patients with rheumatoid arthritis who were biologic-naive and had a Clinical Disease Activity Index (CDAI) >10, who started their first TNFi for ≥3 months and then switched to a second biologic, were included in the study.

View Article and Find Full Text PDF
Article Synopsis
  • CT-P47 is a biosimilar tocilizumab candidate being studied for its pharmacokinetic (PK) equivalence to the EU-approved reference drug in healthy Asian adults.
  • The study used a double-blind, multicenter, parallel-group design, with participants receiving either CT-P47 or EU-tocilizumab, and focused on measuring various PK endpoints like AUC and maximum serum concentration (C).
  • Results showed that CT-P47 had equivalent PK measures compared to EU-tocilizumab, was well-tolerated, and exhibited similar immunogenicity and safety profiles.
View Article and Find Full Text PDF

Objective: The coronavirus disease 2019 (COVID-19) pandemic created challenges for patients with RA. We examined the potential impact of the pandemic on patient-reported outcomes (PROs), disease activity and medication profiles, comparing the periods pre-pandemic and during the pandemic.

Methods: Patients enrolled in the Ontario Best Practices Research Initiative were included if they had at least one visit to a physician or study interviewer within 12 months before and after the start of pandemic-related closures in Ontario (15 March 2020).

View Article and Find Full Text PDF
Article Synopsis
  • The study aimed to compare the retention rates of tumor necrosis factor inhibitors (TNFi) and tofacitinib (TOFA) for rheumatoid arthritis patients using combined data from two Canadian registries, addressing previous findings that were limited by small sample sizes.
  • A total of 1,318 patients starting either TNFi (825) or TOFA (493) were analyzed, revealing similar overall discontinuation rates between the two groups; however, TNFi users were significantly less likely to discontinue treatment due to adverse events.
  • The findings suggest that while discontinuation for any reason was comparable between TNFi and TOFA, TNFi had a better profile for patients regarding treatment-related side effects.
View Article and Find Full Text PDF

Objectives: We aimed to demonstrate that the proportion of rheumatoid arthritis patients achieving 20%/50%/70% improvement in American College of Rheumatology (ACR20/50/70) responses to Food and Drug Administration-approved biologic disease-modifying antirheumatic drugs (bDMARDs) after an inadequate response to methotrexate (MTX) and after failure of the first bDMARDs followed a consistent pattern.

Methods: This systematic review and meta-analysis was performed in accordance with MECIR (Methodological Expectations for Cochrane Intervention Reviews) standards. Two separate groups of randomized controlled trials were included: the first group included studies with biologic-naive patients who added bDMARD to MTX as intervention arm compared with the placebo plus MTX group.

View Article and Find Full Text PDF

Rheumatoid arthritis (RA) is a highly heritable complex disease with unknown etiology. Multi-ancestry genetic research of RA promises to improve power to detect genetic signals, fine-mapping resolution and performances of polygenic risk scores (PRS). Here, we present a large-scale genome-wide association study (GWAS) of RA, which includes 276,020 samples from five ancestral groups.

View Article and Find Full Text PDF

Purpose: The Rheumatoid Arthritis Flare Questionnaire (RA-FQ) is a patient-reported measure of disease activity in RA. We estimated minimal and meaningful change from the perspective of RA patients, physicians, and using a disease activity index.

Methods: Data were from 3- to 6-month visits of adults with early RA enrolled in the Canadian Early Arthritis Cohort.

View Article and Find Full Text PDF
Article Synopsis
  • The study aimed to evaluate the safety and efficacy of filgotinib, a JAK1 preferential inhibitor, in Japanese patients who had an inadequate response to methotrexate (MTX) over 52 weeks.
  • Patients were randomly assigned to receive either filgotinib or adalimumab while continuing stable doses of MTX, with efficacy assessed at various intervals and safety monitored through adverse event reporting.
  • Results showed that filgotinib maintained efficacy and safety over the one-year period, with adverse events remaining consistent when compared to the overall population, indicating its potential as a viable treatment option.
View Article and Find Full Text PDF

Objective: The Canadian Tofacitinib for Rheumatoid Arthritis Observational (CANTORAL) is the first Canadian prospective, observational study assessing tofacitinib. The objective was to assess effectiveness and safety for moderate to severe rheumatoid arthritis (RA). Coprimary and secondary outcomes are reported from an interim analysis.

View Article and Find Full Text PDF

Objectives: Medical cannabis is often used to alleviate common symptoms in patients with chronic conditions. With cannabis legalisation in Canada and easier access, it is important that rheumatologists understand its potential impact on their practice. Among patients attending rheumatology clinics in Ontario we assessed: the prevalence of medical cannabis use; symptoms treated; rheumatologists' perceptions.

View Article and Find Full Text PDF

Background: Patients with inflammatory arthritis (IA) are at high risk for atherosclerotic cardiovascular disease (ASCVD), yet management of dyslipidemia is infrequently prioritized. We applied Canadian dyslipidemia guidelines to determine how many patients with IA would be eligible for primary prevention with statins.

Methods: We conducted a cross-sectional study of patients with IA in a cardio-rheumatology clinic, with no known CVD and without statin therapy at cohort entry.

View Article and Find Full Text PDF

Objectives: The Clinical Disease Activity Index (CDAI) is routinely used in clinical care when treating-to-target RA patients. Previous validation studies have looked at CDAI's overall performance; this analysis aimed at evaluating its properties by disease state and identifying drivers of variance.

Methods: RA patients enrolled in the OBRI registry, with available follow-up of ≥6 months were included.

View Article and Find Full Text PDF

Objective: Adults with rheumatoid arthritis (RA) are at a higher risk for infections, including influenza and related complications. We identified influenza vaccination coverage in adults newly diagnosed with RA and examined sociodemographic RA characteristics and attitudes associated with vaccination.

Methods: We used data from patients enrolled in the Canadian Early Arthritis Cohort between September 2017 and February 2021.

View Article and Find Full Text PDF

Objective: Tofacitinib (TOF) is an oral, small-molecule drug used for rheumatoid arthritis (RA) treatment and is one of several alternative treatments to tumor necrosis factor inhibitors (TNFi). We evaluated physician- and patient-reported effectiveness of TNFi compared to TOF, using real-world data from the Ontario Best Practices Research Initiative (OBRI).

Methods: Patients enrolled in the OBRI initiating TOF or TNFi between 2014 and 2019 were included.

View Article and Find Full Text PDF
Article Synopsis
  • The study assessed the effectiveness and safety of filgotinib, a Janus kinase-1 inhibitor, in Japanese rheumatoid arthritis patients who didn't respond well to methotrexate.
  • In a 52-week study of 147 patients, filgotinib showed higher American College of Rheumatology response rates and better disease control compared to adalimumab and placebo after 24 weeks.
  • Treatment was generally safe, with low rates of serious infections and no deaths, indicating filgotinib's potential as a beneficial therapy for this patient group.
View Article and Find Full Text PDF