We observed no statistically significant differences in percentages of in - hospital mortality ( 28 % vs . 34 % , P = 0 . 46 ) , ICU admission ( 20 % vs . 28 % , P = 0 . 37 ) or invasive mechanical ventilation ( 18 % vs . 26 % , P = 0 . 31 ) between patients with or without ACEI / ARB treatment .