Table 1. Sociodemographic characteristics of 422 respondents.

Sociodemographic characteristic		Frequency	Percent
Age	18-20	270	64.0
	21-30	97	23.0
	41-50	32	7.6
	51 or above	23	5.5
Education	Less than high school	28	6.6
	High school	126	29.9
	College	141	33.4
	University degree	122	28.9
	None	5	1.2
Marital status	Single	217	51.4
	Married	185	43.8
	Divorced	15	3.6
	Widow	5	1.2
Nationality	Saudi	411	97.4
	Non-Saudi	11	2.6
Residence	Urban	323	76.5
	Rural	99	23.5
Smoking	Never smoked	225	53.3
	Past smoker	99	23.5
	Current smoker	98	23.2
Smoking methods	Cigarettes or cigars	161	38.2
	Chewing tobacco	5	1.2
	Hookah	49	11.6
Number of smoking/cigarettes per day	< 5/day	114	27.1
	5-15/day	53	12.6
	>15/ day	36	8.6
Do you drink Coffee currently	Yes	300	71.1
	No	101	23.9
	Past drinker	21	5.0
Coffee consumption (cups/day)	Less than 3	218	51.7
	From 3 to 5	108	25.6
	More than 5	96	22.7