Predictors		General Knowledge Level								P
		Poor		Moderate		Good		Total
		n	%	n	%	n	%	n	%
Age (years)	Less than 30	159	47.2	127	37.7	51	15.1	337	100	0.391
	From 31 to 40	59	42.8	48	34.8	31	22.5	138	100
	From 41 to 50	7	38.9	7	38.9	4	22.2	18	100
Nationality	Saudi	212	49.9	158	37.2	55	12.9	425	100	0.000*
Nationality	Non-Saudi	13	19.1	24	35.3	31	45.6	68	100	0.000*
Occupation	Doctor	16	31.4	15	29.4	20	39.2	51	100	0.007*
	Pharmacist	11	45.8	9	37.5	4	16.7	24	100
	Radiology technologist	28	40.6	28	40.6	13	18.8	69	100
	Nurse	165	49.1	125	37.2	46	13.7	336	100
	Physiotherapist	2	28.6	4	57.1	1	14.3	7	100
	Lab specialist	3	50	1	16.7	2	33.3	6	100
Marital status	Single	126	43.6	120	41.5	43	14.9	289	100	0.039*
	Married	88	47.1	57	30.5	42	22.5	187	100
	Divorced	9	64.3	5	35.7	0	0	14	100
	Widowed	2	66.7	0	0	1	33.3	3	100
Medical history	Nil	205	45.4	170	37.6	77	17	452	100	0.650
	Diabetes mellitus	4	36.4	4	36.4	3	27.3	11	100
	Hypertension	9	50	4	22.2	5	27.8	18	100
	Other	7	58.3	4	33.3	1	8.3	12	100