Table 1. Demographic characteristics of the participants and oral hygiene habits.

Demographic		Number	%
Age (years)	Below 20	54	16.8
	20-29	158	49.1
	30-39	55	17.1
	40-49	32	9.9
	50-59	20	6.2
	>60 (60-85)	3	0.9
Gender	Female	214	66.5
	Male	108	33.5
Educational level	Intermediate school	7	2.2
	Secondary school	47	14.6
	College	239	74.2
	Postgraduate studies (Master's and PhD)	22	6.8
	Others	7	2.2
Occupation	Government sector	76	23.6
	Private sector	37	11.5
	Private job	5	1.6
	Unemployed	194	60.2
	Retired	10	3.1
Do you clean your teeth using a brush and toothpaste?	Once a day	82	25.5
	Twice daily	145	45.0
	More than twice daily	57	17.7
	Irregular	33	10.2
	Use the Miswak only	5	1.6
Do you have any chronic diseases?	Nothing	292	90.7
	Diabetes	6	1.9
	Heart disease	1	0.3
	Hypertension	6	1.9
	Asthma and respiratory diseases	11	3.4
	Epidemic liver disease	2	0.6