Pelvic floor muscle tenderness on digital palpation among women: convergent validity with central sensitization.

BACKGROUND: Tenderness on palpation of the pelvic floor muscles (PFMs) is a clinical assessment tool used alongside other tests to identify PFM involvement in pelvic complaints including pelvic pain. Although reliability of PFM tenderness has been determined, validity has yet to be established. OBJECTIVES: To assess convergent validity of PFM tenderness on digital palpation with the presence of central pain mechanism, as determined by a score of greater than 40 on the Central Sensitization Inventory (CSI). A secondary objective was to assess the agreement between PFM tenderness and self-reported symptoms of PFM sensitivity. METHODS: Participants completed a battery of self-report questions, the CSI, and various physical assessments (blinded assessors). Convergent validity was assessed between tenderness on palpation and the CSI. Kappa statistics were used to determine agreement between tenderness on palpation and self-reported perineal pain, urinary urgency, dyspareunia, and dysmenorrhea. RESULTS: Ninety-nine female participants with hip or back pain and at least one self-reported symptom of pelvic floor dysfunction were included in the study (mean age 40.56±12.72 years). Convergent validity was found between PFM tenderness on palpation and scores greater than 40 on the CSI (X12=4.2,p=0.04). There was poor agreement between tenderness on palpation with dyspareunia (agreement 62.83%, Kappa=0.27), dysmenorrhea (agreement 55.75%, Kappa=0.14), or perineal pain (agreement 53.04%, Kappa=0.10). CONCLUSIONS: PFM tenderness on digital palpation confirmed convergent validity with CSI scores, suggesting central pain mechanisms. Clinicians may need to consider the role of central pain mechanisms in their clinical decision making when treating PFM dysfunction.

Predictors of Pelvic Floor Muscle Dysfunction Among Women With Lumbopelvic Pain.

BACKGROUND: There is evidence to suggest that a large proportion of individuals seeking care for lumbopelvic pain also have pelvic floor muscle dysfunction (PFMD). Because the majority of physical therapists do not have the requisite training to adequately assess pelvic floor musculature, determining predictors of PFMD could be clinically useful. OBJECTIVE: The objective was to establish a combination of factors (self-report and physical) predictive of PFMD in women with lumbopelvic pain. DESIGN: This was a cross-sectional study. METHODS: Participants completed a battery of self-report and physical assessments (masked assessors). Three clinical findings characterized PFMD: weakness of the pelvic floor, lack of coordination of the pelvic floor, and pelvic floor muscle tenderness on palpation (bilateral obturator internus). Univariate and multivariate logistic regression analyses were used to determine the extent to which different predictors were associated with PFMD. RESULTS: One hundred eight women with self-reported lumbopelvic pain (within the past week) were included in the study (mean age = 40.4 years; SD = 12.6 years). None of the examined factors predicted pelvic floor muscle weakness. Two factors independently predicted pelvic floor muscle tenderness on palpation: very strong and/or uncontrollable urinary urges (odds ratio [OR] = 2.93; 95% confidence interval [CI] = 1.13-7.59) and Central Sensitization Inventory scores of 40 or greater (OR = 3.13; 95% CI = 1.08-9.10). LIMITATIONS: The sample consisted of young women, some of whom were not actively seeking care. Additionally, the technique for assessing pelvic floor muscle tenderness on palpation requires further validation. CONCLUSIONS: Women who have lumbopelvic pain, uncontrollable urinary urgency, and central sensitization were, on average, 2 times more likely to test positive for pelvic floor muscle tenderness on palpation. Further studies are needed to validate and extend these findings.

Association between lumbopelvic pain and pelvic floor dysfunction in women: A cross sectional study.

BACKGROUND: The prevalence, cost and disability associated with lumbopelvic pain continues to rise despite the range of available therapeutic interventions, indicating a deficiency in current approaches. A literature base highlighting a correlation between lumbopelvic pain and pelvic floor function is developing; however, the features that characterize this correlation have yet to be fully established. PURPOSE: The purpose of this study was to determine the prevalence and characteristics of pelvic floor muscle function among women with lumbopelvic pain. METHODS: A cross-sectional study was conducted on non-pregnant women presenting with lumbopelvic pain to one of seven outpatient orthopaedic clinics in Canada. Potential participants underwent a screening process to assess for pelvic floor muscle dysfunction. RESULTS: A total of 182 women were recruited and 97 were excluded, leaving 85 participants (n = 85). Of these, 95.3% were determined to have some form of pelvic floor dysfunction. Specifically, 71% of the participants had pelvic floor muscle tenderness, 66% had pelvic floor weakness and 41% were found to have a pelvic organ prolapse. Participants with combined low back pain and pelvic girdle pain presented with higher levels of disability and increased characteristics of pelvic floor dysfunction. CONCLUSIONS: Our findings corroborate and extend recent research supporting the hypothesis that a high proportion of pelvic floor muscle dysfunction is present among women with lumbopelvic pain. Specifically, increased pelvic floor muscle pressure-pain sensitivity represented the most frequent characteristic, the clinical implications of which require further study.