Table 5.

Sexual health and risk behaviours among adolescent females, BC AHS 2008

Sexual Behaviour	Younger females (14 & 15 years old)		Older females (16 & 17 years old)		p value*
	%	95% CI	%	95% CI
Forced sex by another youth	11.9	8.7 – 16.1	6.2	3.8 – 9.8	p = .007
Forced sex by an adult	3.9	2.1 – 7.1	1.1	0.4 – 3.5
Forced by both youth & adult	0.3	0 – 1.8	0	0
Unwanted sex in past year because of alcohol or drugs	18.3	14.3 – 23.1	11.3	8.2 – 15.4	p =.016
Alcohol/drug use before last sex	27.3	22.4 – 32.9	22.6	18.4 – 27.4	p =.311
3 + sexual partners in past year	8.5	5.8 – 12.3	3.8	2.4 – 6.0	p =.007
Condom used at last sex	70.4	64.7 – 75.5	74.9	69.0 – 80.1	p =.248
Effective birth control at last sex**	82.9	77.7 – 87.0	89.8	85.4 – 93.0	p =.026
Pregnancy involvement	5.3	3.1 – 9.0	0.9	0.2 – 3.6	p =.032
Told had an STI	2.1	0.9 – 4.9	1.9	0.9 – 4.1	p =.846

^*The p-value is calculated from a variant of the second-order Rao-Scott adjusted chi-square test statistic, an adjusted F, and its degrees of freedom.

^**Among the 82.9% of younger females who reported effective birth control at last sex, 55.8% used condoms only, 12.3% used hormonal methods only, and 31.9% used dual methods; among the 90.1% of older females who reported effective birth control at last sex, 42.2% used condoms only, 15.8% used hormonal methods only, and 42.0% used dual methods.