Table 5.

The trends in the prevalence of ever had sexual intercourse among young adolescents aged 12 years and 15 years between 2003 and 2017 or the earliest and latest surveys by World Health Organization region, sex, and age.

Region	Total sample, % (95% CI)	P value	Boys, % (95% CI)	P value	Girls, % (95% CI)	P value	12-13 years old, % (95% CI)	P value	14-15 years old, % (95% CI)	P value
Total	–3.1 (–3.5 to –2.7)	<.001	–3.9 (–4.5 to –3.3)	<.001	–2.5 (–2.9 to –2.1)	<.001	–1.1 (–2.0 to –0.2)	.02	–3.7 (–4.2 to –3.2)	<.001
Africa	–3.4 (–4.5 to –2.3)	.008	–2.8 (–4.7 to –0.9)	<.001	–3.7 (–4.9 to –2.5)	<.001	–3.9 (–7.8 to 0.1)	.31	–3.1 (–4.3 to –1.9)	.001
Americas	–2.6 (–3.5 to –1.7)	<.001	–6.6 (–8.1 to –5.1)	<.001	0 (–1.1 to 1.1)	.99	1.3 (–0.8 to 3.4)	.43	–2.6 (–3.8 to –1.4)	<.001
Southeast Asia	–1.0 (–1.5 to –0.5)	.008	–0.8 (–1.6 to 0.1)	.99	–1.2 (–1.8 to –0.6)	.002	–0.5 (–3.5 to 2.5)	.92	–1.2 (–1.9 to –0.5)	.02
Western Pacific	–3.2 (–4.7 to –1.7)	<.001	–4.6 (–7.7 to –1.5)	<.001	–1.9 (–3.2 to –0.6)	<.001	–3.1 (–10.6 to 4.4)	.32	–5.3 (–7.2 to –3.4)	<.001