Note: The patients were divided into manual CPR and MCC CPR group depending on whether the patients were applied with MCC after arriving at the hospital, the chest compression out-of-hospital was not
Note: Hands-off time was defined as the time that was longer than 1s between two consecutive compressions. Percentage of hands-off time = T2 (T2: hands-off time) / T1 (T1: total chest compression time