Interviewers asked, "Which of these do you think is the most effective for preventing sexually transmitted diseases such as syphilis, gonorrhea or AIDS?" Respondents were given a card with seven specific choices, and the survey form instructed interviewers to mark only one choice (including "don't know methods" and "don't know").

Choices included on the flashcard were:

• Diaphragm

• Condom (rubber)

• IUD (loop, coil)

• Rhythm (safe period by calendar)

• Foam

• Pill

• Withdrawal (pulling out)