Table 2.

Comparison between patients and controls for their clinical and sociodemographic characteristics (X² and Fischer exact test).

	Patients		Controls		p value	OR	95% CI
	n = 24	%	n = 24	%
Sex
Female	7	29.2	7	29.2	1.000		1
Male	17	70.8	17	70.8		1.00	(0.23–4.34)
Age
<55 years old	5	20.8	5	20.8	1.000		1
≥55 years old	19	79.2	19	79.2		1.00	(0.07–13.7)
Socio-economic status
Low	12	50.0	5	20.8	0.281		1
Medium	10	41.7	16	66.7		0.29	(0.05–1.41)
High	2	8.3	3	12.5		0.24	(0.24–2.35)
Number of sexual partners
1 to 2	9	37.5	17	70.8	0.030		1
3 to 4	9	37.5	6	25.0		6.99	(0.86–56.8)
> 5	6	25.0	1	4.2		2.55	(0.30 - ND)
Oral sex practice
No	9	37.5	3	12.5	0.0001		1
Yes	9	37.5	0	0.0		0.11	(0.02–0.80)
DK/NR	6	25.0	21	87.5
Smoking habit
No	16	66.7	3	12.5	0.0001		1
Yes	8	33.3	21	87.5		0.18	(0.03–0.65)
Passive smoker
No	20	83.3	7	29.2	0.0001		1
Yes	4	16.7	17	70.8		0.07	(0.02–0.32)
Alcohol consumption
No	12	50.0	10	41.7	0.562		1
Yes	12	50.0	14	58.3		0.77	(0.24–2.34)
Acid reflux
No	12	50.0	8	33.3	0.0001		1
Yes	4	16.7	16	66.7		0.18	(0.03–0.50)
DK	8	33.3	0	0.0
Medication in the past 15 days
No	15	62.5	9	37.5	0.099
Yes	9	37.5	15	62.5
Tumor location
Amygdala	4	16.7	–		–
Hypopharynx	1	4.2
Lower lip	1	4.2
Larynx	2	8.3
Tongue	2	8.3
Oropharynx	11	45.8
Not reported	3	12.5

Performed using X2 and Fisher exact test.

DK: does not know.

NR: No response.