Skip to content

Definition & Pronunciation

IPA:/ˌɪn.tɚˈnæʃ.ə.nəl ˈɪn.deks əv ɪˈrek.taɪl ˈfʌŋk.ʃən/Phonetic Spelling:in-ter-NASH-uh-nuhl IN-deks uhv ee-REK-tile FUNK-shuhn

International Index of Erectile Function (IIEF) is a standardized questionnaire used to assess erectile function and related aspects of male sexual health.

Developed by researchers Raymond C. Rosen and colleagues in 1997, the IIEF is one of the most widely used clinical and research tools for evaluating erectile dysfunction (ED). It measures erectile function, sexual satisfaction, orgasmic function, sexual desire, and overall satisfaction.

The IIEF is commonly used in medical research, urology, sexual medicine, and clinical practice to assess sexual function, evaluate treatment outcomes, and study erectile health.

Sexopedia Quick Reference

International Index of Erectile Function

Also Known As: Erectile Function Questionnaire, Erectile Dysfunction Assessment Scale

Grammar
Part of speech: Noun phraseForms: International Index of Erectile Function; IIEF; IIEF-5; IIEF-15
Synonyms
Erectile Function Measure, Erectile Dysfunction Assessment Tool

Note: These terms are broader. International Index of Erectile Function specifically refers to a validated questionnaire developed to measure erectile and related sexual functions.

Easy Explanation

The International Index of Erectile Function (IIEF) is a questionnaire that helps measure erectile function and other aspects of sexual health.

It asks about experiences related to:

Healthcare professionals and researchers use the results to understand erectile function and monitor changes over time.

Purpose of the IIEF

The IIEF was created to provide a reliable and consistent way to evaluate erectile function.

It is used to:

  • identify possible erectile difficulties;
  • measure severity of erectile dysfunction;
  • evaluate treatments;
  • conduct sexual health research;
  • compare outcomes in clinical studies.

The questionnaire helps provide a structured assessment rather than relying only on informal descriptions.

Development of the International Index of Erectile Function

The IIEF was developed by Raymond C. Rosen and colleagues and published in 1997.

Before the IIEF, different studies used inconsistent methods to measure erectile dysfunction. The IIEF was designed to create a standardized tool that could be used internationally in clinical trials and medical settings.

It became an important measurement tool in sexual medicine research.

Main Domains of the IIEF

The original IIEF-15 evaluates five major areas.

Erectile Function

This is the primary focus of the IIEF.

It examines:

  • ability to achieve erections;
  • ability to maintain erections;
  • confidence in erectile ability;
  • difficulties during sexual activity.

Orgasmic Function

This domain assesses experiences related to orgasm, including:

  • ability to reach orgasm;
  • satisfaction with orgasm.

Sexual Desire

This area examines:

Intercourse Satisfaction

This evaluates satisfaction related to sexual intercourse, including:

  • enjoyment;
  • fulfillment;
  • confidence during sexual activity.

Overall Satisfaction

This examines general satisfaction with sexual life and relationships.

IIEF-5 (Simplified Version)

A shorter version called the IIEF-5 was developed as a quick screening tool for erectile dysfunction.

The IIEF-5 focuses mainly on erectile function and is often used in clinical settings because it is faster to complete.

It is also known as the Sexual Health Inventory for Men (SHIM).

Scoring and Interpretation

The IIEF uses a scoring system in which responses are converted into numerical values.

Higher scores generally indicate better erectile function, while lower scores may suggest greater difficulty.

Healthcare professionals interpret scores within the person’s overall health context rather than using the questionnaire alone to make conclusions.

IIEF in Clinical Practice

Doctors, particularly urologists and sexual medicine specialists, may use the IIEF when evaluating erectile concerns.

It can help assess:

The questionnaire is usually combined with medical history and other clinical information.

IIEF in Sexual Health Research

The IIEF is widely used in research studies involving:

  • erectile dysfunction treatments;
  • cardiovascular health;
  • diabetes-related sexual problems;
  • aging and sexual function;
  • medication effects.

Because it is standardized, researchers can compare results across different studies and populations.

Erectile Function and Overall Health

Erectile function can be influenced by many factors, including:

The IIEF measures sexual function but does not explain every possible cause of erectile difficulties.

Ethical Considerations

Because sexual function is sensitive personal information, proper use of the IIEF requires:

Results should be discussed without shame or judgment.

Limitations of the IIEF

Although widely used, the IIEF has limitations.

These include:

  • reliance on self-reported answers;
  • focus mainly on male sexual function;
  • limited coverage of emotional and relationship factors;
  • possible cultural differences in interpretation.

It is one assessment tool and should be considered alongside other clinical information.

IIEF and Sexual Diversity

The IIEF was primarily developed to evaluate erectile function in men, especially in clinical contexts involving erectile dysfunction.

Modern sexual health research recognizes that sexual well-being includes diverse experiences involving gender, relationships, identity, and different forms of sexual expression.

Common Misunderstandings

The IIEF measures masculinity.
No. It measures aspects of erectile and sexual function.

A low IIEF score defines a person’s sexual ability.
No. It indicates reported difficulties in specific areas at a particular time.

The IIEF measures only erections.
No. It also examines orgasm, desire, satisfaction, and sexual experiences.

The IIEF can diagnose every sexual problem.
No. It is one assessment tool and does not replace professional evaluation.

The IIEF is only used in hospitals.
No. It is also widely used in medical research.

Sample Sentences

  1. The International Index of Erectile Function is commonly used to assess erectile health.
  2. Researchers used the IIEF to measure changes after treatment.
  3. The IIEF provides a standardized method for evaluating erectile dysfunction.
  4. Doctors may use the IIEF alongside medical history and physical evaluation.
  5. The IIEF-5 is a shorter screening version of the original questionnaire.
  6. Sexual health researchers often include the IIEF in clinical studies.
  7. The International Index of Erectile Function measures several aspects of sexual function.
  8. Understanding the International Index of Erectile Function helps explain how erectile health is assessed in medicine.

Connection to Gender & Sexuality

The International Index of Erectile Function is connected to sexuality because it evaluates aspects of sexual functioning, desire, satisfaction, and intimate experiences.

Although it was developed mainly for assessing erectile function in men, sexual health is broader than erectile ability and includes emotional, relational, and personal aspects of sexuality.

An inclusive approach recognizes that sexual well-being involves diverse experiences and that assessment tools should be used respectfully and without judgment.


sexopedia.cois an educational glossary of sexual and gender-related terms—helping you improve your English while deepening your understanding of identity, language, and self-expression.