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What is the International Index of Erectile Function for diagnosing ED?

Marc B. Garnick, MD
Hematology & Oncology
The original International Index of Erectile Function (IIEF) questionnaire includes 15 questions to assess erectile function, orgasm ability, sexual desire, satisfaction with sexual intercourse, and overall satisfaction. An abridged version of the questionnaire, called the IIEF-5, evaluates erectile function and satisfaction with five questions. Totaling the point value of each answer yields a final score that indicates the severity of erectile dysfunction (ED): severe (5 to 7 points); moderate (8 to 11 points); mild to moderate (12 to 16 points); mild (17 to 21 points); and no ED (22 to 25 points). Because the answers to some questions are subjective, clinicians also rely upon the medical history, physical exam, and lab tests to diagnose and treat ED.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.