Effects of voluntary pre-contraction of the pelvic floor muscles (the Knack) on female stress urinary incontinence-a study protocol for a RCT.

BACKGROUND: Stress urinary incontinence (SUI) is a subtype of urinary incontinence that occurs more commonly amongst women. The pelvic floor muscle training (PFMT) is considered the gold standard for treating SUI. Another technique called the Knack postulated that pre-contraction of the pelvic floor muscles (PFM) during activities of increasing intra-abdominal pressure prevents urinary loss. Currently, there are no studies supporting the Knack for the treatment of SUI. Thus, the aim of this study is to test the hypothesis that voluntary pre-contraction of PFM can treat SUI. For this purpose, the following parameters will be analysed and compared amongst (1) the Knack, (2) PFMT and (3) the Knack + PFMT groups: urine leakage as assessed by the pad test, urinary symptoms, muscle function, quality of life, subjective cure, adherence to exercises in the outpatient setting and at home and perceived self-efficacy of PFM exercises. METHODS: A single-centre, double-blind (investigator and outcome assessor) randomised controlled trial with a 3-month follow-up of supervised treatment and an additional 3 months of follow-up (unsupervised) for a total of 6 months of follow-up. Two hundred ten women with mild to moderate SUI will be included, aged between 18 and 70 years. To compare the primary and secondary outcome measures within and between the groups studied (before and after intervention), the ANOVA statistical test will be used. Primary and secondary outcome measures will be presented as mean, standard deviation, 95% confidence interval and median and minimum and maximum values. DISCUSSION/SIGNIFICANCE: This study closes a gap, as voluntary PFM pre-contraction (the Knack) has not yet been included in the physiotherapeutic treatment of SUI, and if shown successful could be implemented in clinical practice. TRIAL REGISTRATION: ClinicalTrials.gov NCT03722719 . Registered on October 29, 2018. Study protocol version 1. Was this trial prospectively registered? Yes Funded by: The present study did not receive funding. Anticipated completion date: The anticipated trial commencement and completion dates are October 2018 and October 2021, respectively. Provenance: Not invited. Peer reviewed. Human research ethics approval committee: Research Ethical Board of the Universidade Federal de São Paulo (UNIFESP), Brazil. Human research ethics approval number: 2.517.312.

Pelvic floor muscle training for female stress urinary incontinence: a randomised control trial comparing home and outpatient training.

INTRODUCTION AND HYPOTHESIS: In the literature, it is suggested that supervised pelvic floor muscle training (PFMT) might be the first option treatment for female stress urinary incontinence (SUI). However, inadequate accessibility to health care and scarce individual resources may prevent adherence to the treatment. Our study is aimed at comparing the efficacy of performing PFMT in an outpatient clinic and at home in Brazilian incontinent women, and to verify if home PFMT may be an alternative to those not able to attend the outpatient sessions. METHODS: A total of 69 women with predominant SUI were randomised into two groups: outpatient PFMT and home PFMT. The primary outcome was the cure of SUI defined as <2 g of leakage in a 20-min pad test. Secondary outcomes were: pelvic floor muscle function; urinary symptoms; quality of life; patient satisfaction; and adherence to home exercise sets. The assessments were conducted at baseline and after 3 months of treatment. Statistical analyses consisted of Student's t, Mann-Whitney U, Chi-squared, and Wilcoxon tests, with a 5% cut-off for significance. RESULTS: A superior objective cure of SUI was observed in the outpatient clinic (62%) compared with the home (28%) PFMT groups (OR: 4.0 [95% CI: 1.4-11.0]; p = 0.011). Secondarily, there was no difference between groups regarding the following: satisfaction with the treatment; quality of life; function of the PFMs; and number of episodes of urine leakage per week. The home adherence to the exercises was superior in the outpatient PFMT group only during the first-month training. CONCLUSIONS: Outpatient PFMT was associated with a higher objective cure of SUI than home PFMT. However, subjective findings show equal benefit of home PFMT providing evidence that this may be an alternative treatment to our population.