| Study groups | |||
---|---|---|---|---|
M-M/S | M-S/M | S-M/S | S-S/M | |
Type of instruction | For multiple rescuers | For single rescuer | ||
Type of scenarios in questionnaires | ||||
 Pre-training questionnaires | Scenario-M | Scenario-S | Scenario-M | Scenario-S |
 Post-training questionnaires | Scenario-S | Scenario-M | Scenario-S | Scenario-M |
Study terms | ||||
 In central regions | 2010.7.1–2010.9.30 | 2010.10.1–2010.12.31 | 2011.1.1–2011.3.31 | 2011.4.1–2011.6.30 |
 In non-central regions | 2011.1.1–2011.3.31 | 2011.4.1–2011.6.30 | 2010.7.1–2010.9.30 | 2010.10.1–2010.12.31 |