Inter- and intraobserver reliability for diagnosing levator ani changes on magnetic resonance imaging

Area of Science:

• Pelvic floor imaging
• Diagnostic reliability studies
• Women's health imaging

Background:

• Pelvic organ prolapse and pelvic floor dysfunction are common in women.
• Accurate diagnosis of pubovisceral muscle avulsions and levator hiatus parameters is crucial for effective management.
• Magnetic resonance imaging (MRI) offers detailed visualization of pelvic floor anatomy.

Purpose of the Study:

• To evaluate the reliability of diagnosing pubovisceral muscle avulsions using MRI.
• To assess the reliability of levator hiatus measurements on MRI.
• To determine both inter- and intraobserver agreement for these assessments.

Main Methods:

• 262 women with pelvic organ prolapse or pelvic floor dysfunction underwent pelvic floor MRI.
• Two observers assessed pubovisceral muscle avulsions (0-3 scale) and levator hiatus dimensions.
• One observer re-evaluated 100 patients; intraclass correlation coefficients (ICCs) were calculated.

Main Results:

• Good interobserver reliability for pubovisceral muscle avulsions (ICC = 0.76-0.79).
• Excellent interobserver agreement for levator hiatus measurements (ICC = 0.85-0.89).
• Excellent intraobserver reliability for both avulsions and hiatus measurements (ICC = 0.80-0.97).

Conclusions:

• MRI provides reliable assessment of pubovisceral muscle avulsions.
• Levator hiatus measurements on MRI demonstrate high reliability.
• MRI is a dependable tool for evaluating key pelvic floor structures in women.