N/A
Completed N=270
Randomized Trial of Interventions to Improve Warfarin Adherence
Atrial Fibrillation · Deep Vein Thrombosis · Dilated Cardiomyopathies
Source: ClinicalTrials.gov NCT00904982 ↗
Enrolled (actual)
270
Serious AEs
6.6%
Results posted
Mar 2017
Primary outcomePrimary: Improved Warfarin Adherence/% Timeout of Target INR Range — 31.6; 23.8; 30.1; 23.9 percentage of out of target INR range
Summary
The purpose of this research study is to see if a lottery which provides the opportunity to win money, a reminder system using a "Med-eMonitor", or the combination of both might be useful in helping patients to achieve better control of their anticoagulation therapy. Selection for the arms of the study is randomized by the study computer. Some will participate in the daily lottery only, some with the reminder system only, some with the reminder system and the daily lottery, and some with neither the lottery nor the reminder system.
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Improved Warfarin Adherence/% Timeout of Target INR Range |
31.6; 23.8; 30.1; 23.9 | — |
Eligibility Criteria
Key Inclusion Criteria
The study population will include all patients at the study sites who:
- are in the maintenance phase of their warfarin treatment (defined using the standard method as the period of time following 2 consecutive visits, at least 7 days apart, of stable target INR after initiation of the drug)
- whose providers indicate are expected to stay on treatment for at least 6 months
- have a target INR of 2 to 3.5
- had at least one INR out of the participant's target range within 90 days prior to enrollment (excluding the baseline visit) and/or INR at the baseline visit was below the participant's target range
- have a working analog telephone line.
Of note, patients do not have to be within their target INR range to enroll; we specifically want to include those who are below the target range at the time of study entry because they may be the patients most likely to be non-adherent.
Key Exclusion Criteria Patients will be excluded if they do not meet the above inclusion criteria,
- have an INR at screening above the target range
- are less than 18 years of age and cannot or will not give consent
- cannot read above a 6th grade reading level
- are enrolled in a clinical trial of warfarin therapy
- are unable to adequately follow study procedures
Data sourced from ClinicalTrials.gov (NCT00904982). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication. Informational only — not medical advice.