Comparison of Outcomes Using 2 Delivery Models of Anticoagulation Care

Staresinic, Anthony G; Sorkness, Christine A.; Goodman, Brian; Pigarelli, Denise Walbrandt

doi:10.1001/archinte.166.9.997

Cited by 38 publications

(43 citation statements)

References 18 publications

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“…Of these, 16 studies were excluded because patients were included for indications other than AF. 14,15,19,[22][23][24][25][27][28][29][30][32][33][34]36,37 Thus, 8 studies, including a total of 14 study groups, met all of the inclusion criteria and were included in the final analysis (Table 1). 17,18,20,21,26,31,35,38 The study groups enrolled a median of 317 patients (interquartile range, 150 to 482 patients; total = 22,237 warfarintreated patients), 31 who were followed for a median of 272.3 patient-years (range, 123.9 to 980.8 patient-years; total = 41,471.9 patient-years).…”

Section: ■■ Resultsmentioning

confidence: 99%

Meta-Analysis to Assess the Quality of Warfarin Control in Atrial Fibrillation Patients in the United States

Baker

Cios²,

Sander³

et al. 2009

JMCP

368

223

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BACKGROUND: Atrial fibrillation (AF) affects a significant proportion of the American population and increases ischemic stroke risk by 4-to 5-fold. Oral vitamin K antagonists, such as warfarin, can significantly reduce this stroke risk but can be difficult to dose and monitor. Previous research on the effects of setting (e.g., randomized controlled trials, anticoagulation management by specialty clinics, usual care by community physicians) on the proportion of time spent within therapeutic range for the international normalized ratio (INR) has not specifically examined anticoagulation in AF patients.OBJECTIVES: Use traditional meta-analytic and meta-regressive techniques to evaluate the effect of specialty clinic versus usual care by community physicians on anticoagulation control, measured as the proportion of time spent in therapeutic INR range, for AF patients that received warfarin anticoagulation in the United States.METHODS: Studies included in a previously published meta-analysis (van Walraven et al., 2006), which systematically searched reports between 1987 and 2005, were also screened for inclusion in our analysis. A subsequent systematic literature search of MEDLINE, EMBASE, and the Cochrane Central Register of Clinical Trials from January 2005 through February 2008 was conducted. Studies were included if they (a) contained at least 1 warfarin-treated group including more than 25 patients for whom INR control was monitored for at least 3 weeks; (b) included patients treated for AF in the United States; (c) used a patient-time approach (patient-year) to report outcomes; and (d) reported data on the proportion of time spent in traditional therapeutic INR ranges (i.e., a lower limit INR between 1.8 and 2.0 and an upper limit INR between 3.0 and 3.5. Studies with INR goals outside this range were excluded). The proportion of time spent within the therapeutic INR range for each study group was expressed as an incidence density using a person-time approach (in years). All studies were pooled using a random effects model and were weighted by the inverse of the variance of proportion of time spent in the therapeutic range. In order to determine how study setting influenced the proportion of time spent within a therapeutic INR range, both subgroup and meta-regression analyses were conducted.RESULTS: This analysis included 8 studies and a total of 14 unique warfarin-treated groups; 3 of the 8 studies and 4 of the warfarin groups were not included in the previous meta-analysis (van Walraven et al., 2006). Overall, patients spent a mean 55% (95% CI = 51%-58%) of their time in the therapeutic INR range. Meta-regression suggested that AF patients treated in a community usual care setting compared with an anticoagulation clinic spent 11% (95% CI = 2%-20%, n = 6 studies with 9 study groups) less time in range.CONCLUSIONS: In the United States, AF patients spend only about one-half the time within therapeutic INR. Anticoagulation clinic services are associated with somewhat better INR control compared with stan...

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Section: ■■ Resultsmentioning

confidence: 99%

Meta-Analysis to Assess the Quality of Warfarin Control in Atrial Fibrillation Patients in the United States

Baker

Cios²,

Sander³

et al. 2009

JMCP

368

223

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“…They show that researchers must continue to evaluate interventions, including anticoagulation clinics, 47,58,59 patient self-management [60][61][62] and telephone communication systems, 63 that increase the amount of time at which patients' international normalized ratios are within the therapeutic range.…”

Section: Discussionmentioning

confidence: 99%

Anticoagulation intensity and outcomes among patients prescribed oral anticoagulant therapy: a systematic review and meta-analysis

Oake¹,

Jennings²,

Forster³

et al. 2008

Canadian Medical Association Journal

150

124

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O ral anticoagulant therapy is essential for the treatment and prevention of many thromboembolic disorders. Since anticoagulants can cause serious adverse events, 1-3 physicians monitor the international normalized ratios of patients taking these drugs to ensure that their ratios fall within a target range.An international normalized ratio of 2-3 is the most common target range. Results of previous studies revealed an increased risk of bleeding among patients whose ratios exceeded 4, an increased risk of stroke among patients whose ratios were 1.5-2 and a decreased risk of stroke at a ratio of 2.4. 4,5 However, the evidence supporting the range of 2-3 has some deficiencies. We sought to determine whether the risk of hemorrhagic and thromboembolic events is minimized at an international normalized ratio of 2-3 among patients taking anticoagulants. In addition, it has been observed that patients spend more time with a ratio below 2 than above 3.6,7 The impact of such systematic underanticoagulation on patient outcomes is unknown. We sought to determine the effect of under-or overanticoagulation on the risk of thromboemboli and hemorrhage. Methods Data sourcesWe searched MEDLINE (1966MEDLINE ( -2006 for potentially pertinent studies. We then modified our strategy to include EMBASE (1980EMBASE ( -2006, the Cochrane Central Register of Controlled Trials (1980Trials ( -2006 and CINAHL (1982CINAHL ( -2006 databases. We manually searched references in the Science Citation Index. Our search strategy is outlined in Appendix 1 (available at www.cmaj.ca/cgi/content/full/179/3/235/DC2). Study selection

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“…The PCMH model generally makes use of interdisciplinary teams to communicate with patients in a comprehensive, coordinated and efficient way [1]. Though primary care clinics have long communicated with patients through telephone, usually as a response to patient initiated requests or to follow-up on a specific procedure [2], the telephone and other forms of remote communication are now promoted as alternatives to traditional face-to-face visits, offering patients more flexibility with encounter modes and schedules [3]. Accordingly, more policies are covering telephone-based care, although reimbursement varies by state and may depend on approach, such as integrating video with audio conferencing [4-6].…”

Section: Introductionmentioning

confidence: 99%

“…Although prior studies have shown that telephone visits can successfully replace in-person care for focused issues, such as follow-up or monitoring [3,10,11], there is little information on how it works for more complex and multifaceted tasks of care coordination, chronic disease management, and preventive health care typically provided in a primary care visit. One study on the impact of substituting telephone care for some VHA clinic visits showed that this mode, with more frequent contact but fewer face-to-face interactions, lowered rates of healthcare utilization with no adverse effects on patient satisfaction [12].…”

Section: Introductionmentioning

confidence: 99%

Scheduled telephone visits in the veterans health administration patient-centered medical home

Sperber

King

Ammarell

et al. 2014

BMC Health Serv Res

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BackgroundThe Veterans Health Administration (VHA) patient-centered medical home model, Patient Aligned Care Teams (PACT), includes telephone visits to improve care access and efficiency. Scheduled telephone visits can replace in-person care for some focused issues, and more information is needed to understand how this mode can best work for primary care. We conducted a study at the beginning of PACT implementation to elicit stakeholder views on this mode of healthcare delivery, including potential facilitators and barriers.MethodsWe conducted focus groups with primary care patients (n = 3 groups), providers (n = 2 groups) and staff (n = 2 groups). Questions were informed by Donabedian’s framework to evaluate and improve healthcare quality. Content analysis and theme matrix techniques were used to explore themes. Content was assigned a positive or negative valuation to indicate whether it was a facilitator or barrier. PACT principles were used as an organizing framework to present stakeholder responses within the context of the VHA patient-centered medical home program.ResultsScheduled telephone visits could potentially improve care quality and efficiency, but stakeholders were cautious. Themes were identified relating to the following PACT principles: comprehensiveness, patient-centeredness, and continuity of care. In sum, scheduled telephone visits were viewed as potentially beneficial for routine care not requiring physical examination, and patients and providers suggested using them to evaluate need for in-person care; however, visits would need to be individualized, with patients able to discontinue if not satisfied. Patients and staff asserted that providers would need to be kept in the loop for continuity of care. Additionally, providers and staff emphasized needing protected time for these calls.ConclusionThese findings inform development of scheduled telephone visits as part of patient-centered medical homes by providing evidence about areas that may be leveraged to most effectively implement this mode of care. Presenting this service as enhanced care, with ability to triage need for in-person clinic visits and consequently provide more frequent contact, may most adequately meet different stakeholder expectations. In this way, scheduled telephone visits may serve as both a substitute for in-person care for certain situations and a supplement to in-person interaction.

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Comparison of Outcomes Using 2 Delivery Models of Anticoagulation Care

Cited by 38 publications

References 18 publications

Meta-Analysis to Assess the Quality of Warfarin Control in Atrial Fibrillation Patients in the United States

Meta-Analysis to Assess the Quality of Warfarin Control in Atrial Fibrillation Patients in the United States

Anticoagulation intensity and outcomes among patients prescribed oral anticoagulant therapy: a systematic review and meta-analysis

Scheduled telephone visits in the veterans health administration patient-centered medical home

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