TABLE 3.

Attrition After Enrollment and After ART Initiation for Younger, Older, and all Adolescents Enrolling at Study Facilities in Kenya, Tanzania, and Uganda From 2001 to 2014

Age Group	Period of Enrollment				P*
	2001-2004	2005-2009	2010-2012	2013-2014
	% (95% CI)	% (95% CI)	% (95% CI)	% (95% CI)
Attrition at 12 mo after enrollment
Younger adolescents	2.6 (0.9 to 6.2)	12.1 (10.6 to 13.8)	9.9 (8.2 to 11.8)	8.7 (5.9 to 12.1)	<0.001
Older adolescents	8.5 (3.7 to 15.9)	25.4 (23.0 to 27.8)	21.5 (19.1 to 24.0)	13.6 (11.0 to 16.4)	<0.001
Total adolescents	4.7 (2.5 to 7.9)	17.7 (16.4 to 19.2)	15.7 (14.1 to 17.3)	12.0 (10.1 to 14.2)	<0.001
P value†	0.041	<0.001	<0.001	0.076
Attrition rate at 12 mo after ART initiation
Younger adolescents	15.1 (9.8 to 21.4)	15.4 (13.5 to 17.4)	19.8 (17.2 to 22.6)	25.3 (18.8 to 32.3)	<0.001
Older adolescents	27.0 (16.7 to 38.4)	24.5 (21.4 to 27.7)	31.8 (28.2 to 35.4)	34.3 (28.7 to 40.0)	0.016
Total adolescents	18.7 (13.7 to 24.2)	18.6 (16.9 to 20.3)	25.1 (22.9 to 27.3)	31.2 (26.9 to 35.6)	<0.001
P value†	0.035	<0.001	<0.001	0.124

^*Compares the cumulative incidence curves by enrollment periods within adolescent age groups

^†Compares the cumulative incidence curves by adolescent age groups within enrollment periods using the Gray test.

CI, confidence interval.