All EMTs (n=210) | P value | |||
Subjective no-flow time (in seconds)† | Objective no-flow time (in seconds)† | |||
First AED analysis (and defibrillation, if needed) | 10 (7–11) | 16 (13–18) | <0.001* | |
BVM ventilation | 3 (2–3) | 3 (2–4) | 0.008* | |
Insertion of i-gel | 2 (1–3) | 3 (2–4) | <0.001* | |
Second AED analysis (and defibrillation, if needed) | 10 (7–15) | 18 (14–21) | <0.001* | |
MCPR deployment | 10 (8–15) | 16 (13–23) | <0.001* | |
Overall | 38 (27.75–47) | 57.5 (49–68) | <0.001* | |
EMT-P (n=66) | EMT-I (n=144) | p value | ||
Subjective no-flow time during MCPR deployment (in seconds)† | 8 (6–15) | 10 (8–18.75) | 0.002* | |
Objective no-flow time during MCPR deployment (in seconds)† | 13.5 (10–19) | 17 (14–24) | <0.001* | |
Subjective performance‡ | Related operation | 4.5 (4–5) | 4 (3–5) | 0.006* |
Correct deployment | 5 (4–5) | 4 (3–5) | 0.001* | |
Objective performance‡ | Related operation | 5 (4–5) | 4 (3–4.75) | <0.001* |
Correct deployment | 5 (4–5) | 4 (3–5) | 0.018* |
The data format is median with an IQR. The data were analysed with the two-sample Wilcoxon rank-sum (Mann–Whitney) test.
*P value less than 0.05.
†The subjective no-flow time comes from questions 12 and 13 in section 4 of the questionnaire (online supplemental appendix I); the objective no-flow time during MCPR deployment comes from item 3 in section 2 of the score sheet (online supplemental appendix II).
‡The subjective scores for related operation and correct deployment come from questions 7 and 8, respectively, in section 4 of the questionnaire (online supplemental appendix I); the objective scores of related operation and correct deployment come from items 1 and 2, respectively, in section 2 of the score sheet (online supplemental appendix II). Related operation refers to the initiation, pausing, and troubleshooting of the MCPR device, whereas correct deployment refers to the correct positioning of the MCPR device.
AED, automated external defibrillator; BVM, bag-valve-mask; EMT, emergency medical technician; EMT-I, emergency medical technician-intermediate; EMT-P, emergency medical technician-paramedic; MCPR, mechanical cardiopulmonary resuscitation.