Although early rapid response team was reported as a full-time operating system, similar efficacy of part-time rapid response team has been recently reported. We sought to investigate the association between the duration of rapid response team operation time and the incidence of general ward cardiopulmonary resuscitation.

Rapid response team (RRT) was introduced to reduce the preventable cardiac arrest in general wards and it has been spread worldwide. RRTs usually consist of dedicated intensivists in RRT and nurse specialists in critical care.

Although RRT implementation could useful, it is not suitable for all hospital circumstances because it is required high cost and plenty of experience in critical care settings. For this reason, to minimize the RRT operating cost, the part-time RRT operation was reported. Recently similar efficacy in part-time operation RRT was reported. However, it is difficult to compare full-time and part-time RRT and no study has been reported the efficacy according to the intensity of RRT operation time.

Authors invested the incidence of general ward cardiopulmonary resuscitation according to the RRT operation time; from the initial implementation to the full-time RRT operation after stepwise extension.

Inclusion Criteria:

• Patients admitted to study hospital from April 1, 2014, to December 31, 2020

Exclusion Criteria:

1. Patients who developed CPR in elsewhere not GW (ICU, emergency department, operation room, outpatient clinics, cardiac catheterization laboratory)
2. younger than 18 years
3. Patients admitted via the emergency department

Patients admitted to study hospital from April 1, 2014, to December 31, 2020