The data from their six-year study was reported in the March issue of the Journal of Adolescent Health.

Researchers followed 106 adolescent women between the ages of 14 and 18 years through annual questionnaires and daily diaries. Each participant completed three questionnaires and multiple 12-week diary entries over a 27-month period. All of the adolescents were from inner-city Indianapolis.

"This data reveals that more than just opportunity plays a role in the frequency of sexual activity among teens," said principal author J. Dennis Fortenberry, M.D., M.S., professor of adolescent medicine and a researcher with the Mid-America Adolescent STD Cooperative Research Center. "I think the take-home message from this study is that more than simple public health solutions are needed to alter such complex behavior."

Dr. Fortenberry and colleagues looked at times and frequency of sexual intercourse and factors that could affect them. Among their findings:

• Sexual intercourse among adolescent women is relatively infrequent, occurring on about 12 percent of days, according to their study diaries.
• Intercourse during unsupervised afternoon times accounts for less than one-third of all intercourse events and was less likely to occur on school days than on vacation days
• Evening/night sex occurred more often on weekends than on vacation days or school days
• Parental supervision reduced the likelihood of afternoon sex but did not affect the frequency of evening/night sex.
• Skipping school increased the likelihood of afternoon sex but had no effect on evening sex.

Through the teen's diaries, researchers tracked other elements that might affect frequency or likeliho
'"/>

Contact: Mary Hardin
mhardin@iupui.edu
317-274-7722
Indiana University
22-Feb-2006