Abstract 10560: Cost-Effectiveness of AF Screening With 2-Week Patch Monitors: The Mhealth Screening to Prevent Strokes Study

Abstract

Introduction. The mHealth Screening to Prevent Strokes (mSToPS) study reported that, compared with standard care, screening older Americans for AF using 2-week Zio patch monitors increased AF diagnosis and oral anticoagulant prescription within one year. The monitored group was also observed to have fewer strokes and deaths at 3 years. The cost-effectiveness of AF screening in this manner has not been explored. Methods. We conducted a health economic analysis of AF screening with Zio patch monitors using patient-level data from the mSToPS study. Clinical outcomes and costs from the payer perspective were obtained from enrollment through 3 years using Aetna claims data. Individual costs, survival and quality-adjusted survival (QALYs) were projected over a lifetime horizon using regression modeling, US life tables and external literature where needed. Potential imbalances between groups were adjusted for with propensity score bin bootstrapping. Results. Study group participants (mean age 74 years, 41% female, median CHA 2 DS 2 -VASC score 3) wore an average of 1.7 two-week monitors at an average cost of $601/person. Over 3 years, monitored individuals were more likely than unmonitored to have outpatient visits, including to cardiology, but less likely to require emergency department visits or hospitalization (see Table). Pharmacy costs over 3 years were similar between groups. Total adjusted 3-year costs, including monitors, were slightly higher (difference $1,170, 95% CI -1315 to 3657) in the monitoring group. In patient-level projections, the monitoring group had slightly better total and quality-adjusted survival (11.91 vs. 11.82 life years, 9.38 vs. 9.30 QALYs) and slightly higher lifetime costs, resulting in an incremental cost-effectiveness ratio of $16,978/QALY gained. Conclusions. Based on lifetime projections derived from the mSToPS study, we found AF screening using 2-week Zio patch monitors to provide high value from a health economic perspective.