. 2023 Feb 13;32(1):e2022612. doi: 10.1590/S2237-96222023000100020

Table 2. Crude association of variables regarding guidance received at school, health service use and risk behavior with sexual initiation in adolescent school students, Piauí, Brazil, 2015.

Variables	Total		Already had sexual intercourse? Yes		PR^a	95%CI^b	p-value^c
Variables	n	%	n	%	PR^a	95%CI^b	p-value^c
Guidance about pregnancy (n = 3,615)
Yes	2,915	80.6	696	25.6	0.88	0.75;1.04	0.361
No	700	19.4	181	27.5	1.00
Guidance about AIDS/STI^d (n = 3,684)
Yes	3,284	89.1	787	25.6	0.89	0.77;1.05	0.498
No	400	10.9	108	27.2	1.00
Guidance about condoms (n = 3,559)
Yes	2,381	66.9	654	28.8	1.35	0.98;1.70	0.130
No	1,178	33.1	236	21.0	1.00
Health service use (n = 3,801)
Yes	2,169	57.1	513	25.5	0.97	0.86;1.15	0.885
No	1,632	42.9	399	25.3	1.00
Knows about HPV^e vaccination (n = 3,795)
Yes	3,402	89.6	787	24.5	0.74	0.63;1.07	0.215
No	393	10.4	124	32.6	1.00
Vaccinated against HPV^e (n = 2,032)
Yes	1,400	68.9	168	11.4	0.57	0.36;0.81	< 0.001
No	632	31.1	134	25.8	1.00
Alcohol consumption (n = 3,855)
Yes	1,677	43.5	660	40.9	3.18	2.68;3.59	< 0.001
No	2,178	56.5	269	14.3	1.00
Cigarette smoking (n = 3,857)
Yes	517	13.4	292	59.0	2.97	2.60;3.27	< 0.001
No	3,340	86.6	636	20.8	1.00
Drug use (n = 3,852)
Yes	147	3.8	107	73.3	3.27	2.95;3.56	< 0.001
No	3,705	96.2	821	24.1	1.00

a) PR: Crude prevalence ratio; b) 95%CI: 95% confidence interval; c) P-value: Chi-square test, d) Acquired Immunodeficiency Syndrome/Sexually Transmitted Infections; e) HPV: Human Papillomavirus.