Forest plot of the association between early coronary angiography and survival in patients with out-of-hospital cardiac arrest A: including unadjusted data from all studies. Forest plot of the association between early coronary angiography and survival in patients with out-of-hospital cardiac arrest A: including unadjusted data from all studies. B: including adjusted data when available. cath, catheterisation; ECA, early coronary angiography; IV, inverse variance; M-H, Maentel Haensel. Rohan Khera et al. Open Heart 2018;5:e000809 ©2018 by British Cardiovascular Society