Women were asked if they had ever engaged in heterosexual sexual intercourse when they or their partner had not used a condom. Those who reported even one such occurrence were further queried about whether they had ever had sexual intercourse when they and their partner had not used any form of birth control (e.g., contraceptive pill). Respondents were specifically asked to exclude occurrences when they were coerced into sexual activity or were voluntarily attempting conception. rVUS was coded as three or more instances of voluntary sexual intercourse without a condom or any form of birth control and was reported by 27.2% of the sample. Median age of onset of first instance of rVUS, in those reporting even one instance, was 17.0 years.
