Abstract P158: Outcomes of Patients with a Transient Ischemic Attack Based on Inpatient Versus Urgent Outpatient Evaluations a Systematic Review and Meta-Analysis

Importance: Management of transient ischemic attack (TIA)and the concept of urgent TIA clinic have gained significant attention over the past years. Objective: To calculate the odds of subsequent ischemic stroke within 2, 7, 30, and 90 days and death within 90 days among the TIA patients who received acute care in a TIA clinic versus those admitted to a hospital. Data Sources: We performed a systematic review and meta-analysis of all the published TIA outcome studies. Included studies were obtained by searching Medline, Web of Science, Scopus, All EBM reviews series, International Clinical Trial Registry Platform (ICTRP), Trip database, and CINAHL, last updated in March 2020, irrespective of the study design, document type, or language. Study Selection: We accepted both the classic time-based definition of TIA and the new tissue-based definition and studies with a combined record of TIA and minor ischemic stroke patients. We excluded studies with a diagnosis of index TIA event after ischemic stroke occurrence, low suspicious for TIA, TIA acute care in settings other than an outpatient clinic or hospital, multicentric studies, or duplicate reports of the same database. Data Extraction and Synthesis: The study was conducted and reported according to PRISMA, MOOSE, and EQUATOR guidelines. Critical appraisal and methodological quality were conducted by ROBINS-E tool. Data were pooled under random-effects models. Results: Systematic review yielded to 19,547 reports, of which titles and abstracts of 9,113 reports were screened. The overall subsequent ischemic stroke odds ratios were estimated by meta-analyses as follows: 4 studies within 2 days with 1,829 patients (OR: 0.93, 95% CI: -0.52-2.38), 5 studies within 7 days with 1,801 patients (OR: 0.68, 95% CI: -0.73-2.08), 4 studies within 30 days with 1,768 patients (OR:1.01, 95% CI: -0.72 - 2.73), and 6 studies within 90 days with 2,319 population (OR: 0.94, 95% CI: 0.22-1.66). The 90-day risk of death by analyzing 3 studies, 1162 patients, was calculated as OR:1.29, 95% CI: 0.76-3.34. Conclusion and Relevance: Hospital management of TIA patients in the acute phase may not be associated with a lower risk of stroke and death compared with urgent outpatient management.