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. Author manuscript; available in PMC: 2008 Oct 29.

Published in final edited form as: J Adolesc Health. 2006 Jul 10;39(3):381–387. doi: 10.1016/j.jadohealth.2005.12.014

Table 3.

Summary table for bootstrap mean percent of protected events and confidence intervals

Coital event-specific contraceptive method	OCP method choice group		Mean difference, 95% CI^a
	Mean %	Mean %
OCP only^b	Stable 26.5	Initiator 3.6	23.0 (6.1, 41.9)^*
	Stable 26.5	Stopper 15.8	10.8 (−9.1, 32.3)
	Initiator 3.6	Stopper 15.8	−12.2 (−27.6, 1.9)
OCP/condom	Stable 44.2	Initiator 11.5	32.7 (2.2, 60.5)^*
	Stable 44.2	Stopper 11.7	32.6 (9.4, 56.3)^*
	Initiator 11.5	Stopper 11.7	−.1 (−16, 23.9)
Condom only	Stable 12.1	Initiator 24.9	−12.8 (−39.8, 6.8)
	Stable 12.1	Stopper 24.5	−12.5 (−32.3, 5.1)
	Initiator 24.9	Stopper 24.5	.3 (−25.7, 31.5)
No contraception	Stable 14.9	Initiator 36	−21.1 (−55.8, 16.9)
	Stable 14.9	Stopper 21.9	−7 (−26.5, 19.7)
	Initiator 36	Stopper 21.9	14.1 (−19.7, 47.2)

^a

Confidence intervals are adjusted for multiple comparisons.

^b

OCP use day prior to coitus or day of coitus.

^*

Significant values.