Abstract
Study Objective
Contraceptive withdrawal, or coitus interruptus, is a widespread method in adolescents,
but factors affecting usage have not been longitudinally investigated. Study objectives
were to examine usage numbers of withdrawal among a group of sexually active adolescent
females and to investigate the influence of personal, partner, and family factors
on usage patterns.
Design/Setting/Participants
Subjects (N=387; 14 to 17 years at enrollment; 92% African American) were recruited from primary
care adolescent health clinics in areas with high rates of pregnancy and sexually
transmitted infection. As part of a larger longitudinal study, subjects contributed
face-to-face quarterly and annual questionnaires assessing contraceptive behavior,
recent sexual behaviors, as well as partner- and family-based attitudes/beliefs.
Interventions, Main Outcome Measures
The outcome variable was: withdrawal use during the previous 12 weeks (no/yes); predictor variables included 19 individual, family and partner variables.
All models additionally controlled for any current hormonal use (no/yes; any method), current condom use (no/yes) and past withdrawal use (past 30 days; no/yes). Logistic regression, with GEE estimation to adjust for repeated
within-subject observations, was performed in SUDAAN, 9.0.
Results
Subjects supplied 1632 quarterly interviews; withdrawal was mentioned in about 25%
of the interviews (392/1632). Controlling for primary contraceptive method, withdrawal
was mentioned in 13.2% (51/307) of interviews with hormonal methods, in 32.4% (255/787)
of the interviews with condoms and in 4.7% (78/1632) of interviews with no method.
Current hormonal use was associated with a decreased likelihood of also using withdrawal
(OR=0.34), whereas past withdrawal use increased the likelihood of current withdrawal
by about 4-fold (OR=4.18). Condom use was not associated with withdrawal use. Current withdrawal use was
more likely with a more diverse sexual repertoire (OR=1.65), more sexual partners in the past 3 months (OR=1.46), higher sexual control (OR=1.15), lower perceived STI risk (OR=0.46), higher sexual self-efficacy (OR=1.24), lower sexual coercion (OR=0.56) higher condom negativity (OR=1.16), living with a boyfriend (OR=2.17) and lower family sexual health support (OR=0.88).
Conclusion
Contraceptive withdrawal in adolescents should not be considered ‘rare.’ Careful clinical
consideration of usage within the context of other contraceptive behaviors, sexual
behaviors/attitudes, and relationship issues could better inform effective contraceptive
counseling efforts.
Key Words
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© 2009 North American Society for Pediatric and Adolescent Gynecology. Published by Elsevier Inc. All rights reserved.