Table 1 Questions asked in the survey form

Section A

Demographic data:

Age

Gender: male/female

Dental/medical student?

Race

Section B

General question:

In general, what would you do if you witness someone having cardiopulmonary arrest? (Assume there is no scene danger and help has already been summoned)

A. Pretend you do not see it and walk away

B. Offer to call the emergency medical services, but be afraid to tell the crowd you are a health care student and/or afraid to offer CPR (while you silently hope that someone else would do the CPR or the ambulance would have arrived quickly)

C. Tell the crowd that you are a health care student and offer to do CPR and advise someone to call the emergency medical services

Section C

Category I (CC + MMV)

No pocket mask, performing both chest compression and mouth-to-mouth ventilation

“You are walking alone. You witnessed victim A having cardiopulmonary arrest (no breathing, no pulse) right in front of you. You have no pocket mask with you. Assuming no scene danger and help has already been summoned, would you perform CPR (both mouth-to-mouth and chest compression) if victim A were

Scenario 1: your own family member?

Scenario 2: your close friend?

Scenario 3: a stranger of different gender from you?

Scenario 4: a stranger of different race from you?

Scenario 5: a stranger of different gender and race from you?

Scenario 6: a stranger involved in a motor vehicle accident with facial trauma/bleeding?

Scenario 7: a stranger who is a child?

Scenario 8: a stranger who is an elderly man/woman from an old folks home?

Scenario 9: an unkempt stranger (appeared to look like a drug addict to you)?

Scenario 10: a person with whom you have a personal dispute?

For each scenario, rate your response with only one of the four options below:

A. “Definitely yes”

B. “Probably yes”

C. “Probably no”

D. “Definitely no”

Category 2 (CC + PMV)

For this category, the above ten hypothetical scenarios are repeated, but this time assuming that the respondent has a pocket mask and is asked to perform mask-to-mouth ventilation besides chest compressions

Category 3 (CC)

For this category, the above ten hypothetical scenarios are repeated, but this time, assuming that the respondent has no pocket mask and is asked to perform chest compressions only