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Intraobserver Reliability of Two-Dimensional Ultrasound Measurements of the Linea Alba in Parous Women During
Claudia Espinoza-Bravo1, Montserrat Rejano-Campo2,3, Fernando Domínguez-Navarro3
1Day Hospital Unit, Hospital Clínico la Florida, Santiago, Chile.
Objective:
To assess the intraobserver reliability of Diastasis Recti Abdominis (DRA) measurement by ultrasonography during four specific abdominopelvic exercises, evaluating interrecti distance, Linea Alba (LA) thickness, and distortion index in parous women.
Methods:
Fifty-four parous women were assessed using ultrasound imaging for the LA. Four exercises were evaluated: crunch, abdominal drawing-in maneuver, pelvic floor muscle contraction, and one exercise based on the de Gasquet Method. Each exercise was performed three times. The ultrasound probe was placed 3 cm above and 2 cm below the umbilicus. Interrecti distance (IRD), distortion index, and LA thickness were measured and analyzed using ImageJ software by independent researchers. Intraobserver reliability was evaluated using the intraclass correlation coefficient (ICC) with a 95% confidence interval.
Results:
ICC values for the IRD ranged from 0.84 to 0.99 for the four exercises. The distortion index showed moderate to high reliability (ICC: 0.77-0.98), while LA thickness also demonstrated moderate to high reliability (ICC: 0.75-0.98).
Conclusion:
The results demonstrate the reliability of ultrasound in measuring key parameters, including LA thickness, distortion, and IRD in women with DRA during various exercises. As a non-invasive tool, it supports evidence-based interventions in postpartum recovery and clinical practice.
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