Table-I.

Univariate analysis of risk factors for oral H.pylori infection.

Variables	H.pylori		χ2	p	OR	95% CI
	+	-
Sex			0.041	0.839	1.067	0.571-1.996
Male	36	33
Female	46	45
Education degree of parents			1.511	0.219	1.510	0.781-2.920
Less than university degree	58	48
University	24	30
Frequency of eating out weekly			2.427	0.119	1.645	0.878-3.081
≥4	50	38
<3	32	40
Intake of fresh vegetables and fruits			0.982	0.322	1.407	0.715-2.770
Daily	28	21
Not daily	54	57
Habit of washing hands before meals			4.838	0.028	0.486	0.254-0.928
Frequent	25	37
Seldom	57	41
Habit of brushing teeth			4.722	0.030	0.490	0.257-0.936
Twice daily	43	54
Once daily	39	24
Dental plaque			5.425	0.020	2.245	1.129-4.463
Yes	33	18
No	49	60
Dental caries			0.722	0.396	0.658	0.250-1.735
Yes	8	11
No	74	67
Family history of stomach diseases			5.983	0.014	2.811	1.202-6.572
Yes	22	9
No	60	69