Evaluating pelvic floor muscle activity in chronic functional constipation: A transabdominal ultrasound study

Chronic functional constipation (CFC) is one of the most challenging types of constipation which negatively influences patients' quality of life. Recently, investigators mentioned pelvic floor muscles (PFMs) as an influential factor in the symptoms of patients with CFC, while its underlying mechanism is still unclear. The aim of this study is to investigate the PFMs function in people with and without CFC using transabdominal ultrasound.

In this cross-sectional and prospective study, we utilized a convenience sample of 200 individuals (100 CFC and 100 non-CFC) aged between 20 and 50 years old. The data collection included the measurement of the bladder base diameters displacement between rest and contraction using transabdominal ultrasound in all subjects. Also, individuals' diet and physical activity were assessed as contributing factors using International Physical Activity Questionnaire and Food Frequency Questionnaire.

The result of MANCOVA revealed no significant group by physical activity level interaction for bladder base diameter at rest and bladder base displacement. Moreover, the Kruskal-Wallis test showed significant difference in physical activity level of patients with CFC in comparison with healthy individuals. Independent T-test results revealed that there is a significant difference in the consumption of fat and dairy subgroups between two groups.

The results indicated that there is no significant association between the bladder base displacement and the development of CFC. Moreover, our data revealed that people with CFC experience a more sedentary life and consume more fat and dairy products in comparison with individuals without CFC.