Abstract
Extended-interval monitoring of warfarin has been proposed to reduce follow-up burden and improve patient satisfaction. We aimed to make an initial assessment of anticoagulation satisfaction before and after an extended-interval warfarin monitoring intervention. We conducted a translational prospective single-arm pilot study of extended-interval warfarin monitoring in five pharmacist-managed anticoagulation clinics. Patients meeting CHEST guideline criteria for extended-interval warfarin monitoring began progressive extended-interval follow-up (6, 8, and 12 weeks thereafter). The Duke Anticoagulation Satisfaction Scale (DASS) was administered at baseline and at end-of-study or study removal (in patients no longer appropriate for extended interval follow-up). Forty-six patients had evaluable pre- and post-intervention DASS survey data. Mean age of patients was 66.5 years, 74 % were non-Hispanic whites, and 48 % were men. Patients completed a mean ± SD of 34 ± 22 weeks of follow-up. Mean ± SD total DASS score at baseline was 45.2 ± 14.2 versus 49.1 ± 14.9 at end-of-study (mean change, +3.9 [95 % CI −0.6–8.4; p = 0.09]), indicating no benefit—and trending toward decrement—to anticoagulation satisfaction. Change in anticoagulation satisfaction varied substantially following extended-interval monitoring, with no evidence of improved satisfaction. Plausible reasons for patients not preferring extended-interval monitoring include increased anxiety and disengagement from self-management activities, both potentially related to less frequent feedback and reassurance during extended interval-monitoring. Additional research is needed to identify who is likely to benefit most from extended-interval monitoring. Anticoagulation satisfaction should be considered with clinical factors and shared-decision making when implementing extended-interval warfarin monitoring.
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Guyatt GH, Akl EA, Crowther M, Gutterman DD, Schuunemann HJ (2012) Executive summary: antithrombotic therapy and prevention of thrombosis, 9th ed: American College of Chest Physicians evidence-based clinical practice guidelines. Chest 141(2 Suppl):7S–47S
Ageno W, Gallus AS, Wittkowsky A, Crowther M, Hylek EM, Palareti G (2012) Oral anticoagulant therapy: antithrombotic therapy and prevention of thrombosis, 9th ed: American College of Chest Physicians evidence-based clinical practice guidelines. Chest 141(2 Suppl):e44S–e88S
Kearon C, Akl EA, Ornelas J, Blaivas A, Jimenez D, Bounameaux H et al (2016) Antithrombotic therapy for VTE disease: CHEST guideline and expert panel report. Chest 149(2):315–352
Holbrook A, Schulman S, Witt DM, Vandvik PO, Fish J, Kovacs MJ et al (2012) Evidence-based management of anticoagulant therapy: antithrombotic therapy and prevention of thrombosis, 9th ed: American College of Chest Physicians evidence-based clinical practice guidelines. Chest 141(2 Suppl):e152S–e184S
Schulman S, Parpia S, Stewart C, Rudd-Scott L, Julian JA, Levine M (2011) Warfarin dose assessment every 4 weeks versus every 12 weeks in patients with stable international normalized ratios: a randomized trial. Ann Intern Med 155(10):653–659
Pengo V, Barbero F, Biasiolo A, Pegoraro C, Cucchini U, Iliceto S (2003) A comparison between six- and four-week intervals in surveillance of oral anticoagulant treatment. Am J Clin Pathol 120(6):944–947
Fihn SD, McDonell MB, Vermes D, Henikoff JG, Martin DC, Callahan CM et al (1994) A computerized intervention to improve timing of outpatient follow-up: a multicenter randomized trial in patients treated with warfarin. National Consortium of Anticoagulation Clinics. J Gen Intern Med 9(3):131–139
Carris NW, Spinelli A, Pierini D, Taylor JR, Anderson KV, Sando K et al (2015) Feasibility of extended-interval follow-up for patients receiving warfarin. Cardiovasc Ther 33(3):98–103
Samsa G, Matchar DB, Dolor RJ, Wiklund I, Hedner E, Wygant G et al (2004) A new instrument for measuring anticoagulation-related quality of life: development and preliminary validation. Health Qual Life Outcomes 2:22
Harris PA, Taylor R, Thielke R et al (2009) Research electronic data capture (REDCap)—a metadata-driven methodology and workflow process for providing translational research informatics support. J Biomed Inform 42(2):377–381
Matchar DB, Jacobson A, Dolor R, Edson R, Uyeda L, Phibbs CS et al (2010) Effect of home testing of international normalized ratio on clinical events. N Engl J Med 363(17):1608–1620
Verret L, Couturier J, Rozon A, Saudrais-Janecek S, St-Onge A, Nguyen A et al (2012) Impact of a pharmacist-led warfarin self-management program on quality of life and anticoagulation control: a randomized trial. Pharmacotherapy 32(10):871–879
Meyer S, Frei CR, Daniels KR, Forcade NA, Bussey M, Bussey-Smith KL et al (2013) Impact of a new method of warfarin management on patient satisfaction, time, and cost. Pharmacotherapy 33(11):1147–1155
McCahon D, Murray ET, Murray K, Holder RL, Fitzmaurice DA (2011) Does self-management of oral anticoagulation therapy improve quality of life and anxiety? Fam Pract 28(2):134–140
Wigle P, Hein B, Bloomfield HE, Tubb M, Doherty M (2013) Updated guidelines on outpatient anticoagulation. Am Fam Physician 87(8):556–566
Hasan SS, Teh KM, Ahmed SI, Chong DW, Ong HC, Naina B (2015) Quality of life (QoL) and International normalized ratio (INR) control of patients attending anticoagulation clinics. Public Health 129(7):954–962
Almeida Gde Q, Noblat Lde A, Passos LC, do Nascimento HF (2011) Quality of life analysis of patients in chronic use of oral anticoagulant: an observational study. Health Qual Life Outcomes 9:91
Casais P, Meschengieser SS, Sanchez-Luceros A, Lazzari MA (2005) Patients’ perceptions regarding oral anticoagulation therapy and its effect on quality of life. Curr Med Res Opin 21(7):1085–1090
Monz BU, Connolly SJ, Korhonen M, Noack H, Pooley J (2013) Assessing the impact of dabigatran and warfarin on health-related quality of life: results from an RE-LY sub-study. Int J Cardiol 168(3):2540–2547
Alegret JM, Vinolas X, Arias MA, Martinez-Rubio A, Rebollo P, Rafols C et al (2014) New oral anticoagulants vs vitamin K antagonists: benefits for health-related quality of life in patients with atrial fibrillation. Int J Med Sci 11(7):680–684
Bamber L, Wang MY, Prins MH, Ciniglio C, Bauersachs R, Lensing AW, Cano SJ (2013) Patient-reported treatment satisfaction with oral rivaroxaban versus standard therapy in the treatment of acute symptomatic deep-vein thrombosis. Thromb Haemost 110(4):732–741
Shore S, Ho PM, Lambert-Kerzner A, Glorioso TJ, Carey EP, Cunningham F et al (2015) Site-level variation in and practices associated with dabigatran adherence. JAMA 313(14):1443–1450
Shore S, Carey EP, Turakhia MP, Jackevicius CA, Cunningham F, Pilote L et al (2014) Adherence to dabigatran therapy and longitudinal patient outcomes: insights from the veterans health administration. Am Heart J 167(6):810–817
Connolly SJ, Ezekowitz MD, Yusuf S, Eikelboom J, Oldgren J, Parekh A et al (2009) Dabigatran versus warfarin in patients with atrial fibrillation. N Engl J Med 361(12):1139–1151
Giugliano RP, Ruff CT, Braunwald E, Murphy SA, Wiviott SD, Halperin JL et al (2013) Edoxaban versus warfarin in patients with atrial fibrillation. N Engl J Med 369(22):2093–2104
Patel MR, Mahaffey KW, Garg J, Pan G, Singer DE, Hacke W et al (2011) Rivaroxaban versus warfarin in nonvalvular atrial fibrillation. N Engl J Med 365(10):883–891
Granger CB, Alexander JH, McMurray JJ, Lopes RD, Hylek EM, Hanna M et al (2011) Apixaban versus warfarin in patients with atrial fibrillation. N Engl J Med 365(11):981–992
Agnelli G, Buller HR, Cohen A, Curto M, Gallus AS, Johnson M et al (2013) Oral apixaban for the treatment of acute venous thromboembolism. N Engl J Med 369(9):799–808
Schulman S, Kearon C, Kakkar AK, Mismetti P, Schellong S, Eriksson H et al (2009) Dabigatran versus warfarin in the treatment of acute venous thromboembolism. N Engl J Med 361(24):2342–2352
Bauersachs R, Berkowitz SD, Brenner B, Buller HR, Decousus H, Gallus AS et al (2010) Oral rivaroxaban for symptomatic venous thromboembolism. N Engl J Med 363(26):2499–2510
Büller HR, Décousus H, Grosso MA, Mercuri M, Middeldorp S, Prins MH et al (2013) Edoxaban versus warfarin for the treatment of symptomatic venous thromboembolism. N Engl J Med 369(15):1406–1415
Wan Y, Heneghan C, Perera R, Roberts N, Hollowell J, Glasziou P et al (2008) Anticoagulation control and prediction of adverse events in patients with atrial fibrillation: a systematic review. Circ Cardiovasc Qual Outcomes 1(2):84–91
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Dr. Marc S. Zumberg reports being the medical director for NCF diagnostics and DNA technology.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Carris, N.W., Hwang, A.Y., Smith, S.M. et al. Patient satisfaction with extended-interval warfarin monitoring. J Thromb Thrombolysis 42, 486–493 (2016). https://doi.org/10.1007/s11239-016-1385-9
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DOI: https://doi.org/10.1007/s11239-016-1385-9