Defining premature ejaculation for experimental and clinical investigations

Area of Science:

• Sexual Health Research
• Urology
• Psychology

Background:

• Premature ejaculation (PE) research is hampered by inconsistent definitions and classification criteria.
• A lack of standardized methods limits progress in understanding PE subtypes and etiologies.

Purpose of the Study:

• To summarize existing research on premature ejaculation definitions and methodologies.
• To identify patterns and compare definitions across different study types.
• To propose a common model for defining PE groups to guide future research.

Main Methods:

• A systematic survey of two bibliographic databases identified 45 studies defining or describing PE groups.
• Data extracted included participant characteristics, recruitment, PE subtypes, classification criteria, partner information, and inclusion/exclusion criteria.
• Analysis focused on identifying commonalities, differences, and trends in PE definition methodologies.

Main Results:

• Over 50% of studies lacked specific criteria or relied on self-identification for PE classification.
• Quantifiable behavioral criteria, primarily ejaculatory latency, were used in 49% of studies.
• Ejaculatory latency was more common in sexual response studies, while penile thrust count appeared in pre-1989 research.

Conclusions:

• The absence of universally accepted PE criteria and subtype identification impedes research and treatment development.
• A proposed flowchart, based on 40 years of research, offers a standardized approach to characterizing PE.
• Standardization is crucial for advancing the field of premature ejaculation research and therapeutic interventions.