RT Journal Article T1 Absolute and Relative Reliability of the Assessment of the Muscle Mechanical Properties of Pelvic Floor Muscles in Women with and without Urinary Incontinence A1 Rodrigues-de-Souza, Daiana Priscila A1 Alcaraz-Clariana, Sandra A1 Garcia-Luque, Lourdes A1 Carmona-Perez, Cristina A1 Garrido-Castro, Juan Luis A1 Cruz-Medel, Ines A1 Camargo, Paula R. A1 Alburquerque-Sendin, Francisco K1 muscle tone K1 tissue stiffness K1 pelvic floor disorders K1 young women K1 Biomechanical properties K1 Young-women K1 Stiffness K1 Impact K1 Validation K1 Tissue K1 Tone K1 Standardization K1 Translation K1 Terminology AB An analysis of the muscle mechanical properties (MMPs) of the pelvic floor muscles (PFMs) is relevant for understanding the physiopathology of urinary incontinence (UI). However, there is no objective and reliable methodology currently available for quantifying the MMPs of PFMs. Thus, the objective was to determine the intra-rater and inter-rater reliability of the MMPs of PFM assessment with a hand-held tonometer device, called the MyotonPRO, in young women with and without UI. Sociodemographic and pelvic floor questionnaires, plus MMPs of PFMs were assessed in 38 nulliparous women with UI and 40 matched healthy women by two trained physiotherapists on two different occasions, 48-72 h apart. Good to excellent absolute reliability was found for tone, stiffness, and decrement of both intra- and inter-rater analyses in both study groups (Intraclass Correlation Coefficient ranged from 0.75 to 0.92), with a trend of lower values for relaxation and creep. The standard error of measurement (SEM) did not achieve 10% of the mean values for any MMPs. The minimum detectable change (MDC) values were also provided for clinical applications. In conclusion, the relative reliability of tone, stiffness, and the assessment of the decrement of PFMs with MyotonPRO is good to excellent for UI and healthy women. The SEM and MDC values were acceptable for their application in clinical settings. PB Mdpi YR 2021 FD 2021-12-01 LK https://hdl.handle.net/10668/28210 UL https://hdl.handle.net/10668/28210 LA en DS RISalud RD Apr 18, 2025