Etanercept, dose-to-target, rheumatoid arthritis, psoriatic arthritis, ankylosing spondylitis, personalized medicine
Conditions
Interventions
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: 1. Diagnosis: RA (according to the American College of Rheumatology 1987 criteria), or PsA (according to the Classification of Psoriatic Arthritis criteria) or AS (according to the 1984 New York Criteria); 2. Treatment with etanercept 50 mg SC weekly (or 25 mg SC twice weekly) for at least 6 subsequent months; 3. Minimal Disease Activity: Outcome Measures in Rheumatology (OMERACT) MDA criteria for RA, MDA criteria for PsA which are defined in collaboration with the Group for Research and Assessment of Psoriasis and Psoriatic Arthritis (GRAPPA) and Ankylosing Spondylitis Disease Activity Score (ASDAS), using C-reactive protein (CRP), inactive or moderate disease activity; 4. Written informed consent.
Exclusion criteria
Exclusion criteria: Planned reasons for treatment discontinuation.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| To determine the proportion of patients with RA, AS or PsA maintaining Minimal Disease Activity after dose interval prolongation of etanercept. | — |
Secondary
| Measure | Time frame |
|---|---|
| 1. To study the cost-effectiveness of tapering down etanercept treatment; 2. To investigate whether the lowest effective etanercept dose will reduce the risk of adverse events; 3. To study the predictive value of serum etanercept trough levels and other patient related factors for successful down titration. | — |
Contacts
Dr. Jan van Breemenstraat 2, 1065 AB Amsterdam