Table 1 Demographic characteristics of participants using OCPs

Age

21.95 (4.1)

Years in college

3.42 (2.1)

Relationship status

   In a relationship

61.2%

   Not in a relationship

38.8%

Primary reason(s) for using hormonal contraception^a

   Pregnancy prevention

84.6%

   Regulation of menses

71%

   Reduce symptoms associated with menses

52.7%

   Improving acne

35.4%

   Treatment of Premenstrual Dysphoric Disorder

2.5%

   Other

3.7%

Sexual orientation

   Heterosexual

92.5%

   Gay/Lesbian

0.8%

   Bisexual

4.7%

   Unsure

2%

Typical month missed doses

   Never

37.8%

   1 time per month

39.6%

   2–3 times per month

18.6%

   4–5 times per month

2.7%

   6 or more times per month

1.2%

Last month missed doses

   Never

46.9%

   1 time per month

31.2%

   2–3 times per month

17.9%

   4–5 times per month

3.3%

   6 or more times per month

0.8%

Mean perceived knowledge (range 0 to 9)

6.03 (1.5)

Mean perceived self-efficacy (range 0 to 4)

3.43 (0.6)