Survival to Discharge Rate and Favorable Neurological Outcome Related to Gender, Duration of Resuscitation and First Document of Patients In-Hospital Cardiac Arrest: A Systematic Meta-Analysis.

Objective: To investigate the relationship between outcomes and demographic-clinical variables in in-hospital cardiac arrest (IHCA).

Methods: The Medline database was searched along with Google Scholar, Scopus, Web of Science, and Persian language database without time limitation until January 6^th, 2020. The inclusion criteria included papers published in journals or presented in English and Persian congress that reported the IHCA outcomes based on the Utstein criterion. All the descriptive, cross-sectional, and cohort studies on CPR were covered based on inclusion and exclusion criteria. Primary checks covered titles and abstracts followed by a full-text check of the remaining papers from the first screening stage. Data analysis was done using comprehensive meta-analysis (CMA) software version 2.0. The finding's heterogeneity was checked using Q and Cochran tests with heterogeneity >50% and the random-effects model was used to estimate survival and favorable neurological outcome (FNO) in the analysis. To detect the publication bias of studies, the subgroup test, meta-regression test, sensitivity analysis test, funnel plot, and Eagger's regression test were used.

Results: Survival to discharge was 19.1% (95% CI=16.8-21.7) and FNO in the survived to discharge cases was 68.1% (95% CI=55.8-78.3). Survival to discharge and FNO were notably higher in men, CPR duration <15min, and shockable dysrhythmias.

Conclusion: IHCA outcomes are poor in developing countries. The outcomes of IHCA in terms of gender were inconsistent with the result reported by other meta-analyses.