1644 FRAILTY AND OUTCOMES AFTER STROKE: A SYSTEMATIC REVIEW AND META-ANALYSIS

Abstract Introduction Frailty is an important clinical syndrome of increased vulnerability to stressors. The impact of frailty on stroke is a growing research area. We carried out a systematic review for an up-to-date picture of the prevalence of frailty and its impact on a wide range of outcomes. Methods We searched Medline, Embase and CINAHL for studies referencing frailty and stroke. We assessed quality of studies using National Heart, Lung, and Blood Institute (NHLBI) quality assessment tools. We collated prevalence of frailty and impact on outcomes after stroke or transient ischaemic attack (TIA). Meta-analysis was conducted to determine pooled odds ratios (OR) and 95% confidence intervals (CI). Where possible, we carried out metanalysis on outcome data. Results We included 28 studies (n=111,787). Studies used the Clinical frailty scale (CFS), (n=6, 10,967). a frailty index (n=10, 19134), Hospital Frailty Risk Score (HFRS) (n=4, 18,373), frailty phenotype (n=4, 10,838), or other assessment methods (n=8, 50,568). Pooled prevalence of frailty was 36% (95% CI 29-43%). Including pre-frailty, prevalence was 48% (40-56%). Increased CFS (n=738) was associated with increased in-hospital mortality, OR=2.43 (95% (CI 1.54-3.84). Higher frailty was associated with higher 28-day, 90 day and one year mortality, higher stroke severity, and NIHSS, mRS and dependency on discharge. Conclusion Increased frailty is associated with multiple adverse outcomes following a stroke, including mortality, worsened functional outcome, and increased dependency at discharge. There was heterogeneity in frailty measures used, precluding meta-analysis.