Predictors		Practices Knowledge Level								P
		Poor		Moderate		Good		Total
		n	%	n	%	n	%	n	%
Age (years)	Less than 30	204	60.5	118	35	15	4.5	337	100	0.035*
	From 31 to 40	71	51.4	54	39.1	13	9.4	138	100
	From 41 to 50	7	38.9	8	44.4	3	16.7	18	100
Nationality	Saudi	270	63.5	139	32.7	16	3.8	425	100	0.000*
Nationality	Non-Saudi	12	17.6	41	60.3	15	22.1	68	100	0.000*
Occupation	Doctor	23	45.1	26	51	2	3.9	51	100	0.010*
	Pharmacist	18	75	6	25	0	0	24	100
	Radiology technologist	29	42	35	50.7	5	7.2	69	100
	Nurse	207	61.6	105	31.3	24	7.1	336	100
	Physiotherapist	3	42.9	4	57.1	0	0	7	100
	Lab specialist	2	33.3	4	66.7	0	0	6	100
Marital status	Single	166	57.4	109	37.7	14	4.8	289	100	0.154
	Married	106	56.7	65	34.8	16	8.6	187	100
	Divorced	10	71.4	3	21.4	1	7.1	14	100
	Widowed	0	0	3	100	0	0	3	100
Medical history	Nil	263	58.2	163	36.1	26	5.8	452	100	0.224
	Diabetes mellitus	5	45.5	6	54.5	0	0	11	100
	Hypertension	9	50	6	33.3	3	16.7	18	100
	Other	5	41.7	5	41.7	2	16.7	12	100
Surgical history	Yes	41	50.6	31	38.3	9	11.1	81	100	0.111
Surgical history	No	241	58.5	149	36.2	22	5.3	412	100	0.111
Medication history	Yes	34	53.1	25	39.1	5	7.8	64	100	0.735
Medication history	No	248	57.8	155	36.1	26	6.1	429	100	0.735
Family history	Nil	252	59.2	150	35.2	24	5.6	426	100	0.067
	Mother	1	12.5	7	87.5	0	0	8	100
	Sister	5	62.5	3	37.5	0	0	8	100
	Grandmother	7	50	6	42.8	1	7.1	14	100
	Aunt	14	46.7	11	36.7	5	16.7	30	100
	Others	3	42.9	3	42.9	1	14.3	7	100
Age at marriage (years)	Less than 20 year	22	66.7	10	30.3	1	3	33	100	0.104
	From 21 to 30	84	55.3	56	36.8	12	7.9	152	100
	From 31 to 40	10	55.6	4	22.2	4	22.2	18	100
	More than 40	0	0	1	100	0	0	1	100
	Single	166	57.4	109	37.7	14	4.8	289	100