OBJECTIVE: To determine the effectiveness and cost-effectiveness of anti-tumor necrosis factor (anti-TNF) medications in a real-world environment for the treatment of rheumatoid arthritis (RA), psoriatic arthritis (PsA), and ankylosing spondylitis (AS) using the Health Assessment Questionnaire (HAQ). METHODS: We created a database of patients with RA, PsA, or AS treated with anti-TNF agents (etanercept, infliximab, or adalimumab) at a large outpatient rheumatology clinic. Patient characteristics, baseline HAQ prior to treatment, subsequent yearly HAQ, and reasons for termination were collected. The cost based on percentage of patients achieving >or= 0.2 improvement in HAQ (minimal clinically important difference, MCID) was calculated using the 2008 direct cost (Cdn) of the medication. RESULTS: Data were available on 297 patients (206 with RA, 57 PsA, 34 AS). The mean age was 55 years, with 12 years of disease, and the mean baseline HAQ (standard error, SE) was 1.37 (0.04). The changes in HAQ (SE) at Years 1, 2, and 3 were -0.31 (0.04), -0.24 (0.06), and -0.27 (0.07) for annual cost to achieve MCID of $41,636, $42,077, and $42,147, respectively. The number needed to treat (NNT) was 1.94 (RA), 1.88 (PsA), and 2.30 (AS). There were no statistical differences between the diseases studied. CONCLUSION: We obtained data on the effectiveness and cost-effectiveness of anti-TNF drugs using the HAQ score, which is known to be an excellent predictor of work disability, morbidity, and mortality. HAQ scores decreased with treatment and were sustained throughout the 3-5 years of followup. The NNT of approximately 2 seems favorable and was similar between diseases.
OBJECTIVE: To determine the effectiveness and cost-effectiveness of anti-tumornecrosis factor (anti-TNF) medications in a real-world environment for the treatment of rheumatoid arthritis (RA), psoriatic arthritis (PsA), and ankylosing spondylitis (AS) using the Health Assessment Questionnaire (HAQ). METHODS: We created a database of patients with RA, PsA, or AS treated with anti-TNF agents (etanercept, infliximab, or adalimumab) at a large outpatient rheumatology clinic. Patient characteristics, baseline HAQ prior to treatment, subsequent yearly HAQ, and reasons for termination were collected. The cost based on percentage of patients achieving >or= 0.2 improvement in HAQ (minimal clinically important difference, MCID) was calculated using the 2008 direct cost (Cdn) of the medication. RESULTS: Data were available on 297 patients (206 with RA, 57 PsA, 34 AS). The mean age was 55 years, with 12 years of disease, and the mean baseline HAQ (standard error, SE) was 1.37 (0.04). The changes in HAQ (SE) at Years 1, 2, and 3 were -0.31 (0.04), -0.24 (0.06), and -0.27 (0.07) for annual cost to achieve MCID of $41,636, $42,077, and $42,147, respectively. The number needed to treat (NNT) was 1.94 (RA), 1.88 (PsA), and 2.30 (AS). There were no statistical differences between the diseases studied. CONCLUSION: We obtained data on the effectiveness and cost-effectiveness of anti-TNF drugs using the HAQ score, which is known to be an excellent predictor of work disability, morbidity, and mortality. HAQ scores decreased with treatment and were sustained throughout the 3-5 years of followup. The NNT of approximately 2 seems favorable and was similar between diseases.
Authors: Nancy A Shadick; Nicole M Gerlanc; Michelle L Frits; Bradley S Stolshek; Brenna L Brady; Christine Iannaccone; David Collier; Jing Cui; Alex Mutebi; Michael E Weinblatt Journal: Clin Rheumatol Date: 2019-07-29 Impact factor: 2.980
Authors: Vibeke Strand; Josef S Smolen; Ronald F van Vollenhoven; Philip Mease; Gerd R Burmester; Falk Hiepe; Dinesh Khanna; Enkeleida Nikaï; Geoffroy Coteur; Michael Schiff Journal: Ann Rheum Dis Date: 2011-03-17 Impact factor: 19.103
Authors: Babak Aberumand; Lillian Barra; Yang Cao; Nicole Le Riche; Andrew E Thompson; Gina Rohekar; Sherry Rohekar; Ashley Bonner; Janet E Pope Journal: Open Rheumatol J Date: 2014-10-17
Authors: Sebastien Viatte; Darren Plant; Buhm Han; Bo Fu; Annie Yarwood; Wendy Thomson; Deborah P M Symmons; Jane Worthington; Adam Young; Kimme L Hyrich; Ann W Morgan; Anthony G Wilson; John D Isaacs; Soumya Raychaudhuri; Anne Barton Journal: JAMA Date: 2015-04-28 Impact factor: 56.272