Abstract 13: Patient-reported Health Status Changes are Associated With Subsequent Clinical Outcomes After Transcatheter Valve Therapies: Insights From the Sts/tvt Registry

Abstract

Background: The goals of TAVR and transcatheter mitral valve repair (TMVr) are to prolong survival, reduce heart failure (HF) hospitalizations, and improve health status. Most patients report large improvements in health status within 30 days of these procedures. While this is an important patient-centered outcome on its own, if these changes were also associated with subsequent clinical outcomes, this would further support using short-term health status as a quality metric for valve procedures. Methods: Among patients who underwent transfemoral TAVR or TMVr, had KCCQ data at baseline and 30 days, and could be linked to CMS for 1-year outcomes; we constructed sequential models examining the association of KCCQ with death and HF hospitalization from 30 days to 1 year: 1) baseline KCCQ, 2) 30-day KCCQ, 3) baseline and 30-day KCCQ, 4) change in KCCQ from baseline to 30 days. In each model, we tested the interaction between procedure type and KCCQ, examined the linearity of the association of KCCQ with outcomes using restricted cubic splines, and adjusted for patient factors (Figure footnote). Results: Our cohort included 73,699 patients who underwent TAVR or TMVr from 2011-18 (median age 83 [IQR 77-87], 53% men, 92% TAVR). There were no significant interactions between procedure type and KCCQ, so all analyses used the combined cohort. Higher baseline KCCQ (model 1) and 30-day KCCQ (model 2) were both strongly associated with lower risk of death and HF hospitalization (Figure). When both were included in the model (model 3), each assessment was independently associated with subsequent outcomes, with the 30-day being most predictive. Change from baseline to 30 days was nonlinearly associated with outcomes (model 4), with increases up to 25 points associated with lower risk of death or HF hospitalization but no further risk reduction beyond 25 points. There were no meaningful changes in the associations after adjusting for patient factors. Conclusion: Short-term improvements in patient-reported health status after TAVR or TMVr were strongly associated with lower risk of death or HF hospitalization, with the 30-day assessment having a stronger association than baseline. These results support the routine use of 30-day KCCQ as a potential measure of quality after TVTs and to identify those at higher risk for adverse outcomes.