Objective: To describe the sensitivity, specificity, positive predictive value, negative predictive value and diagnostic accuracy of five clinical tests used to measure trunk muscle endurance in low back pain.

Design: A cross-sectional non-experimental design.

Setting: Orthopaedic and physical therapy departments of four hospitals and outpatient physical therapy clinics, Tehran, Iran.

Subjects: Convenience sample of 200 subjects participated in this study. Subjects were categorized into four groups: men without low back pain (N = 50, mean (SD) age = 38 (12) years), women without low back pain (N = 50, mean (SD) age = 43 (11) years), men with low back pain (N = 50, mean (SD) age = 39 (12) years) and women with low back pain (N = 50, mean (SD) age = 43 (12) years).

Mahyar Salavati, Mojgan Moghadam, Ismaeil Ebrahimi, Amir Massoud Arab


The purpose of this study was to quantify changes in postural stability with fatigue of the frontal and sagittal movers of the lower extremities. There were four test sessions, with a randomized order assigned according to the muscles tested and the plane of motion. Subjects were 20 healthy men (age: 22.6 ± ۲٫۴ years, height: 173.7 ± ۳٫۶ cm, weight: 63.3 ± ۷٫۹ kg). During each session, one set of muscle groups was fatigued using isokinetic contractions: ankle plantar/dorsi flexors, ankle evertor/invertors, hip flexor/extensors or hip abductor/adductors.

M Chehrehrazi, AM Arab, N Karimi, M Zargham


Introduction and hypothesis

Transabdominal (TA) ultrasound and perineometry have been currently used to assess lifting aspect and squeezing action of pelvic floor muscles (PFM) function, respectively, in women with stress urinary incontinence (SUI). However, no study has directly compared these measurements. The purpose of this study was to investigate the reliability and correlation between perineometry and TA ultrasound as measurements of different aspect of PFM function.


A total of 28 women with SUI participated in the study. Vaginal squeeze pressure using a perineometer and bladder base movement on TA ultrasound was measured. Scattergram was depicted to determine the correlation between variables. Intraclass correlation coefficient and Bland–Altman plot were used to assess reliability.


Scatter diagram depicted significant correlation of TA ultrasound with vaginal squeeze pressure (r = ۰٫۷۲, R2 = ۰٫۵۲, p < ۰٫۰۰۰۱). High reliability was found for measurements.


TA ultrasound measurement may be an alternative measurement to perineometry when assessing PFM function.


Pelvic floor muscles, Perineometry, Transabdominal ultrasound, Stress urinary incontinence, Vaginal squeeze pressure, Reliability