Table 1.

Survey structure and questions.

Survey page, field, and question			Type of question
Introduction
	Consent			N/A
		Reason for refusal (if applicable)		MAQa
	Attrition
		N/Ab
1
	Demographics
		Year of birth		Open (Regexc)
		Gender		MCQd
		Medical or dental medicine student		MCQ
		Previous qualifications		MCQ
		Former student or graduate of another health care profession		MCQ
		Target specialty		MCQ
2
	General BLSe knowledge
		Ever heard of BLS or ACLSf before		Yes/No
		Meaning of “AEDg”h,i		Open
		Year of the last BLS guidelines update		Open (Regex)
		Phone number of the emergency medical services dispatch centerh,j		Open
3
	Prior BLS experience
		Current or past: (1) student of another healthcare profession; (2) BLS instructor; (3) professional rescuer		MAQ
		Prior BLS training		Yes/No
		Wish to be trained, or more trained, in BLS procedures		Yes/No
4
	Specific BLS knowledge
		Criteria used to recognize out-of-hospital cardiac arresth		MAQ
		BLS sequenceh		Ordering
		Artery for pulse assessmenth		MCQ
		Compression depthh		MCQ
		Compressions-to-ventilations ratioh		MCQ
		Compression rateh		MCQ
		Compression-only cardiopulmonary resuscitationh		Yes/No
		Treatment of a choking patient, conscious, unable to either cough or talkh		MCQ
		Self-assessed confidence in the ability to perform resuscitation		1-10 Likert scale

^aMAQ: multiple answer question (more than 1 answer accepted).

^bN/A: not applicable.

^cRegex: regular expression validation.

^dMCQ: multiple choice question (only 1 answer accepted).

^eBLS: basic life support.

^fACLS: advanced cardiovascular life support.

^gAED: automated external defibrillator.

^hQuestions used to assess the baseline knowledge (score out of 10 questions).

ⁱAll answers containing “defibrillator” in English or in French will be considered as correct (not case sensitive, spelling mistakes accepted).

^jAcceptable answers: 112, 144, and 911 which all work in Geneva, Switzerland. 144 is the official Swiss number.