“…Six studies (LOE 1 44,87 ; LOE 2 150 ; LOE 4 47,153,154 ) using different training approaches demonstrated that CPR skills (eg, alerting EMS, chest compressions, ventilations) decay rapidly (within 3 to 6 months) after initial training. Two studies (LOE 1 155 ; LOE 4 156 ) reported skill decay within 7 to 12 months after initial training.…”