Table 3.

Crude OR and Adjusted OR of variables associated with adequate knowledge (score ≥ 3 in the items investigating knowledge about HPV infection and HPV vaccination) among students enrolled before the intervention conducted.

Variables		Crude OR	CI 95%	p-Value	Adj OR	CI 95%	p-Value
Gender	Male	ref		0.14	ref		0.36
	Female	1.16	0.95–1.42		1.11	0.89–1.37
School year	First	ref		<0.001	ref		0.01
	Second	1.95	1.49–2.54		1.09	0.98–1.95
	Third	2.11	1.68–2.66		1.18	1.03–1.36
School Deprivation Index	A	ref		0.04	ref		0.75
	B	1.01	0.76–1.18		1.03	0.87–1.21
	C	0.66	0.53–0.91		0.89	0.72–1.06
Residency	Province	ref		0.48
	Municipality	0.95	0.89–1.27
Nationality	Italian	ref		0.92
	Other	1.04	0.49–2.18
Deprivation Index	Deprived	ref		<0.001	ref		0.02
	Not Deprived	1.60	1.29–2.00		1.35	1.05–1.73
Talking about STDs at home	No	ref		<0.001	ref		<0.001
	Yes	2.13	1.70−2.67		1.62	1.27–2.07
Talking about STDs at school	No	ref		<0.001	ref		<0.001
	Yes	2.65	2.15–3.27		2.15	1.70–2.71
Talking about STDs with physician	No	ref		0.38
	Yes	1.11	0.87–1.42
Have you ever heard about HPV infection or vaccine	No	ref		<0.001	ref		<0.001
	Yes	2.34	1.88–2.90		1.80	1.42–2.29