Dentists Are at a Higher Risk for Oral Helicobacter pylori Infection

Table 2

Clinical parameters of study populations.

	Dentists	Nondentist group	Statistical analysis
Age			^a
Sex			^b
Male	30 (15.0%)	47 (23.5%)	()
Female	60 (20.0%)	63 (31.5%)
Residence			^b
Urban area	83 (41.5%)	91 (45.5%)	()
Rural area	7 (3.5%)	19 (9.5%)
Educational background			^c
Primary schools and below	0 (0.0)	15 (7.5%)	()
Junior middle school	0 (0.0)	13 (6.5%)
Senior school	0 (0.0)	7 (3.5%)
Junior college education	1 (0.5%)	15 (7.5%)
Regular college	23 (11.5%)	32 (32.5%)
Master	55 (27.5%)	22 (11%)
PhD and above	11 (5.5%)	5 (2.5%)
Unclear	0 (0.0)	1 (0.5%)
Years of working			^c
1-2 yrs	49 (24.5%)	49 (24.5%)	()
3-5 yrs	34 (17.0%)	31 (15.5%)
6-10 yrs	6 (3.0%)	11 (5.5%)
>11 yrs	1 (0.5%)	26 (13%)
Unclear	0 (0.0)	3 (1.5%)

^a test; ^bchi-square test; ^cWilcoxon rank test.