Comparison of National Institutes of Health-Chronic Prostatitis Symptom Index with International Index of Erectile Function 5 in Men with Chronic Prostatitis/Chronic Pelvic Pain Syndrome: A Large Cross-Sectional Study in China

Table 1

Questions of International Index of Erectile Function 5.

Question	Score
Q1. How do you rate your confidence that you could get and keep an erection?	1 = Very low; 2 = Low; 3 = Moderate; 4 = High; 5 = Very high
Q2. When you had erections with sexual stimulation, how often were your erections hard enough for penetration?	0 = No sexual activity; 1 = Almost never or never; 2 = A few times (less than half the time); 3 = Sometimes (about half the time); 4 = Most times (more than half the time); 5 = Almost always or always
Q3. During sexual intercourse, how often were you able to maintain your erection after you had penetrated (entered) your partner?	0 = Did not attempt intercourse; 1 = Almost never or never; 2 = A few times (less than half the time); 3 = Sometimes (about half the time); 4 = Most times (more than half the time); 5 = Almost always or always
Q4. During sexual intercourse, how difficult was it to maintain your erection to completion of intercourse?	0 = Did not attempt intercourse; 1 = Extremely difficult; 2 = Very difficult; 3 = Difficult; 4 = Slightly difficult; 5 = Not difficult
Q5. When you attempted sexual intercourse, how often was it satisfactory for you?	0 = Did not attempt intercourse; 1 = Almost never or never; 2 = A few times (less than half the time); 3 = Sometimes (about half the time); 4 = Most times (more than half the time); 5 = Almost always or always