Table 2.

Responses of the participants for the knowledge items (n = 480).

	Item	Number (n)	Percentage (%)
Have you ever heard about clinical trials (CTs)?	Yes No/not sure	170 310	35.4 64.6
Definition of a CT	Correct answer Wrong answer	192 288	40.0 60.0
Have you heard of an ethics review committee for a CT?	Yes No	93 387	19.4 80.6
Have you heard about the Saudi FDA?	Yes No	270 210	56.3 43.7
Does the general authority of food and drug administration have any role in CT’s policy?	Yes No	376 104	78.3 21.7
Are there any ethical guidelines to regulate CTs?	Yes No	398 82	82.9 17.1
Is there a direct benefit to the participants in CTs?	Correct answer Wrong answer	98 382	20.4 79.6
Is there a direct benefit to the Saudi community due to the people participating in CTs?	Yes No	415 65	86.5 13.5
When can the research team start a CT?	Correct answer Wrong answer	235 245	49.0 51.0
Can the research team initiate the CT without the consent of the participants?	Yes No	436 44	90.8 9.2
Are the participants free to withdraw from the CT at any time?	Yes No	312 168	65.0 35.0
Patients’ confidential information (such as name) can be disclosed in the published article?	Yes No	183 297	38.1 61.9
	Total knowledge score (mean ± SD)	7.10 ± 2.03