Table 1.

The International Index of Erectile Function (IIEF-5) Questionnaire(http://www.hiv.va.gov/provider/manual-primary-care/urology-tool2.asp, originally published in Rosenet al. (1999).

Over the past 6 months
1. How do you rate your confidence that you could get and keep an erection?	Very low 1	Low 2	Moderate 3	High 4	Very high 5
2. When you had erections with sexual stimulation, how often were your erections hard enough for penetration?	Almost never/never 1	A few times (much less than half the time) 2	Sometimes (about half the time) 3	Most times (much more than half the time) 4	Almost always/always 5
3. During sexual intercourse, how often were you able to maintain your erection after you had penetrated (entered) your partner?	Almost never/never 1	A few times (much less than half the time) 2	Sometimes (about half the time) 3	Most times (much more than half the time)4	Almost always/always 5
4. During sexual intercourse, how difficult was it to maintain your erection to completion of intercourse?	Extremely difficult 1	Very difficult 2	Difficult 3	Slightly difficult 4	Not difficult 5
5. When you attempted sexual intercourse, how often was it satisfactory for you?	Almost never/never 1	A few times (much less than half the time) 2	Sometimes (about half the time) 3	Most times (much more than half the time) 4	Almost always/always 5

IIEF-5 scoring:

The IIEF-5 score is the sum of the ordinal responses to the five items.

22–25: No erectile dysfunction.

17–21: Mild erectile dysfunction.

12–16: Mild to moderate erectile dysfunction.

8–11: Moderate erectile dysfunction.

5–7: Severe erectile dysfunction.