Early initiation of sexual activity: a risk factor for sexually transmitted diseases, HIV infection, and unwanted pregnancy among university students in China

Table 2 Timing of sex initiation and its association with subesequent sexual behaviors and risks.

Variables	Total (n = 1908)^a	BHS (n = 115)^a	HS (n = 705)^a	Univ (n = 1088)^a	P value^b
First sex
Partner type
Regular	85.4	60.9	83.4	89.2
Non-regualr	13.9	35.7	16.2	10.2	< 0.001
Condom use
Used	29.8	15.7	27.2	32.9	< 0.001
Not used/unsure	69.8	84.3	72.2	66.6
Most recent sex
Partner type
Regular	78.6	62.6	78.0	80.7
Non-regualr	10.5	26.1	11.2	8.4	< 0.001
Condom use
Used	44.2	32.2	42.3	46.7	0.002
Not use	46.9	59.1	48.9	44.3
OC use by partner
Used	23.8	21.7	23.3	24.4	0.429
Not use	66.1	70.4	66.4	65.4
Sex during last year ^c
Partner type
Only regular	83.0	55.0	81.8	86.5
Ever non-regular	14.7	40.0	17.4	10.6	< 0.001
Condom use
Always/often	40.3	18.8	35.6	45.2	< 0.001
Never/rarely/sometime	55.1	76.3	60.4	49.9
OC use by partner
Always/often	22.3	13.8	20.2	24.4	0.003
Never/rarely/sometime	74.8	83.8	77.8	72.1
Partner number
1	74.1	33.8	66.0	82.9
≥ 2	17.6	40.0	25.6	10.6	< 0.001
Sex over lifetime
Condom use
Always/often	41.7	20.9	38.3	46.1	< 0.001
Never/rarely/sometime	52.8	74.8	55.9	48.4
Partner number
1	56.9	15.7	40.7	71.8
≥ 2	32.1	67.0	47.9	18.1	< 0.001
Anal sex
Yes	3.9	12.2	4.3	2.8	< 0.001
No	90.7	83.5	90.1	91.8
Partner's pregancy
Yes	10.2	24.3	10.2	8.6	< 0.001
No/unsure	85.3	70.4	84.8	87.2
Partner's induced abortion
Yes	9.6	23.5	9.8	8.0	< 0.001
No/unsure	85.6	70.4	84.7	87.8
Diagnosed with an STD
Yes	1.3	7.0	1.6	0.6	< 0.001
No	89.3	86.1	87.8	90.5

^a Data were shown in percentages, and the perentages of some items may not add up to 100 due to missing data.
^b Chi square test for linear trend in proportion.
^c n = 1409, 80, 500, 829, for Total, BHS, HS, Univ initiator, respectively.

ISSN: 1471-2458