On the Reliability and Validity of Physician Ratings for Vulvodynia and the Discriminant Validity of its Subtypes

Are pelvic pain and increased pelvic floor muscle tone associated in women with persistent noncancer pelvic pain? A systematic review and meta-analysis

BACKGROUND

The association between pelvic pain and pelvic floor muscle (PFM) tone in women with persistent noncancer pelvic pain (PNCPP) is unclear.

AIM

To synthesize the evidence of the association between pelvic pain and PFM tone in women with PNCPP.

METHODS

A systematic review was conducted via MEDLINE, Emcare, Embase, CINAHL, PsycINFO, and Scopus to identify relevant studies. Studies were eligible if pelvic pain and PFM tone outcome measures were reported among women aged >18 years. The National Heart, Lung, and Blood Institute's Quality Assessment Tool for Observational Cohort and Cross-sectional Studies was used to assess study quality. Studies were pooled by assessment of PFM tone via a random effects model. Associations between the presence of pelvic pain and PFM tone were assessed with odds ratio (OR), while linear associations were assessed with Pearson or Spearman correlation.

OUTCOMES

Pelvic pain measures (intensity, threshold, and frequency) and resting PFM tone in women with PNCPP, as evaluated by any clinical assessment method or tool.

RESULTS

Twenty-four studies were included in this review. The presence of pelvic pain was significantly associated with increased PFM tone as assessed by digital palpation (OR, 2.85; 95% CI, 1.66-4.89). Pelvic pain intensity was inversely but weakly associated with PFM flexibility when evaluated through dynamometry (r = -0.29; 95% CI, -0.42 to -0.17). However, no significant associations were found between pelvic pain and PFM tone when measured with other objective assessment methods.

CLINICAL IMPLICATIONS

Pelvic pain and increased PFM tone may not be directly associated; alternatively, a nonlinear association may exist. A range of biopsychosocial factors may mediate or moderate the association, and clinicians may need to consider these factors when assessing women with PNCPP.

STRENGTHS AND LIMITATIONS

This review was reported according to the PRISMA guidelines. All possible findings from relevant theses and conference abstracts were considered in our search. However, nonlinear associations between pelvic pain and increased PFM tone were not assessed as part of this review.

CONCLUSION

Pelvic pain may be linearly associated with increased PFM tone and decreased PFM flexibility when measured with digital palpation or dynamometry; however, this association was not observed when other aspects of PFM tone were assessed through objective methods. Future studies are required using robust assessment methods to measure PFM tone and analyses that account for other biopsychosocial factors that may influence the association.

Sequence of Pelvic Examination Does Not Affect Patients With Baseline Vulvovaginal Syndromes: A Randomized Clinical Trial

OBJECTIVE

The purpose of this study is to determine the optimal sequence in performing a pelvic examination to reduce discomfort in patients with baseline vaginal pain.

METHODS

A randomized controlled trial of women presenting for a new appointment at the Drexel Vaginitis Center was conducted. Women were assigned to either group A, a Q-tip touch test, speculum examination, then bimanual examination, or group B, a Q-tip touch test, bimanual examination, then speculum examination. The primary outcome was visual analog scales to assess pain at baseline and after each portion of the examination. Secondary outcomes were responses to questionnaires for self-esteem, quality of life, and sexual function.

RESULTS

Two hundred women were enrolled in the trial. For both group A and group B, each portion of the examination was similarly scored regardless of whether the speculum examination was performed before or after bimanual examination. Pain during the speculum examination was higher than pain during the other components of the examination, although not significant (P = 0.65).When looking at reported pain outcomes, outcomes did not differ as a whole or between groups in relation to sexual activity, sexual orientation, and previous hysterectomy. The data were not significantly different between groups for self-esteem scores, sexual dysfunction, or quality of life scores.

CONCLUSION

In women with baseline vaginal pain, there was no difference in pain scores between the different components of the pelvic examination, nor is there a significant difference in pain during the examination compared with their baseline pain. Most patients reported minimal pain during each component.

Vulvodynia

Vulvodynia is a condition that occurs in 8-10% of women of all ages and is characterized by pain at the vulva that is present during sexual and/or non-sexual situations. Diagnosis is established through careful medical history and pelvic examination, including the cotton-swab test. The onset and maintenance of vulvodynia involves a complex interplay of peripheral and central pain mechanisms, pelvic floor muscle and autonomic dysfunction, anxiety, depression and childhood maltreatment as well as cognitive-affective, behavioural and interpersonal factors. Given the absence of empirically supported treatment guidelines, a stepwise approach of pelvic floor physical therapy and cognitive behavioural therapy as well as medical management is suggested, with surgery as the last option. Vulvodynia has a negative effect on the quality of life of women and their partners, and imposes a profound personal and societal economic burden. In addition, women with vulvodynia are more likely to report other chronic pain conditions, which further alters their quality of life. Future efforts should aim to increase girls', women's and healthcare professionals' education and awareness of vulvodynia, phenotype different subgroups of women based on biopsychosocial characteristics among more diverse samples, conduct longitudinal studies and improve clinical trial designs.

Exploring the neural correlates of touch and pain in women with provoked vestibulodynia

Group differences in touch and pain thresholds-and their neural correlates-were studied in women with provoked vestibulodynia (PVD; N = 15), a common subtype of vulvodynia (chronic vulvar pain), and pain-free control women (N = 15). Results from quantitative sensory testing and self-report measures indicated that, as compared with control participants, women with PVD exhibited allodynia (ie, pain in response to a normally nonpainful stimulus) and hyperalgesia (ie, an increased response to a normally painful stimulus) at vulvar and nonvulvar sites. In addition, brain imaging analyses demonstrated reduced difference scores between touch and pain in the S2 area in women with PVD compared with control participants, supporting previous findings of allodynia in women with PVD. There were no significant reductions in difference scores between touch and pain for regions related to cognitive and affective processing of painful stimuli. The results of this study contribute important information to the general pain and vulvodynia literatures in elucidating the specific sensorimotor neural mechanisms that underlie hyperalgesia in a chronic pain population. These results have implications for differentiating neural processing of touch and pain for women with and without PVD. Future research should attempt to examine alterations related to hyperalgesia in commonly comorbid conditions of PVD.

Outcome Measurement Instruments for Provoked Vulvodynia: A Systematic Review

OBJECTIVE

The objective of this study was to detail the outcome measurement instruments used in randomized control trials and observational studies investigating therapeutic interventions for provoked vulvodynia.

MATERIALS AND METHODS

We searched Ovid Medline, Embase, Emcare, and PyschINFO libraries from database inception through April 2017. We included randomized control trials and observational studies of provoked vulvodynia that used instruments to measure the outcome of therapeutic interventions.

RESULTS

A total of 2299 articles were retrieved and 25 were eligible for inclusion in accordance with the selection criteria. The included studies measured 26 different outcomes, using 110 outcome measurement instruments. Patient-reported outcomes were most commonly measured (144/166, 86%), followed by physician-reported outcomes (20/166, 12%). The most commonly measured outcomes were patient-reported psychological impact of disease (27/166, 16%), patient-reported improvement in dyspareunia (25/166, 15%), and patient-reported reduction in pain (24/166, 14%). The Pain Catastrophizing Scale, the Beck Depression Inventory, and the State Trait Anxiety Questionnaire were the most commonly used instruments to measure psychological impact.The most commonly measured clinician-rated outcome was an improvement in pain (17/166, 10%), which was most frequently assessed by the cotton swab test. Only 34 (31%) outcome measurement instruments were specific to vulvodynia (26/110, 23%) or sexual functioning (8/110, 7%).

CONCLUSIONS

There is a wide range of outcome measurement instruments used in provoked vulvodynia studies, resulting in inconsistency of reporting and difficulty in comparing and combining findings for systemic review. There is a pressing need for the development of validated, reliable instruments and consensus on a core outcome set for further research purposes.

Reliability and Convergent Validity of the Algometer for Vestibular Pain Assessment in Women with Provoked Vestibulodynia

OBJECTIVE

Women with provoked vestibulodynia (PVD) suffer pain at the entry of the vagina elicited by pressure as during vaginal penetration. To quantify vestibular pain, we developed a new instrument, an algometer. The aim of this study was to investigate the test-retest reliability of the algometer and evaluate its convergent validity for vestibular pain assessment in women with PVD.

METHODS

Twenty-six women with PVD participated in the study. Vestibular pain was assessed with the new algometer and the already known vulvalgesiometer during two different sessions 2 to 4 weeks apart. At each session, the pressure pain threshold (PPT) and pressure pain tolerance (PPTol) were measured twice at the 3, 6, and 9 o'clock sites of the vestibule in random order. The test-retest reliability (intra- and inter-session) of the algometer was calculated using the intraclass correlation coefficient (ICC) and standard error of measurement (SEM). Its convergent validity was evaluated by the correlation coefficients between PPTs and PPTols measured by the algometer and those measured with the vulvalgesiometer.

RESULTS

Intra-session reliability at all three sites for PPTs and PPTols in both sessions was excellent (ICC = 0.859 to 0.988, P ≤ 0.002). Inter-session reliability was good to excellent (ICC = 0.683 to 0.922, SEM = 15.06 to 47.04 g, P ≤ 0.001). Significant correlations were found between the two tools for all sites for PPTs (r = 0.500 to 0.614, P ≤ 0.009) and PPTols (r = 0.809 to 0.842, P < 0.001).

DISCUSSION

Findings showed that the algometer is a reliable and valid instrument for measuring PPTs and PPTols in the vestibular area in women with PVD. This technology is promising for pinpointing treatment mechanisms and efficacy.

Pain Symptoms in Fibromyalgia Patients with and without Provoked Vulvodynia

Objective. The aim of the study was to compare the pain symptoms of fibromyalgia patients exhibiting (FMS+PVD) and not exhibiting (FMS) comorbidity with provoked vulvodynia. Study Design. The case control study was performed in 39 patients who had been diagnosed with FMS and accepted to undergo gynaecological examination and in 36 healthy women (C). All patients completed standardized questionnaires for pain intensity, pain area, and psychological functioning. The gynaecological examination included vulvar pain pressure reactivity (Q-tip), pelvic tone assessment (Kegel manoeuver), and a semistructured interview collecting detailed information about pelvic symptoms and sexual function. Results. FMS+PVD patients displayed a higher number of associated symptoms than FMS patients. The vulvar excitability was significantly higher in FMS+PVD than in FMS and in both groups than in Controls. Half of FMS+PVD patients were positive to Kegel manoeuver and displayed higher scores in widespread pain intensity, STAI-Y2, and CESD levels than Kegel negative patients. Conclusions. The study reveals that increased vulvar pain excitability may occur in FMS patients independently of the presence of coital pain. Results suggest that coital pain develops in patients with higher FMS symptoms severity due to the cooperative effects of peripheral and central sensitization mechanisms.

Reliability and reproducibility of novel methodology for assessment of pressure pain sensitivity in pelvis

Vestibulodynia, the most common type of chronic vulvovaginal pain, impairs the psychological, physical health of nearly 10% of women at some point in their lifetime. The aim of this investigation was to establish reliable standardized methodologies for assessment of pain sensitivity in vulvar mucosa and pelvic musculature. We enrolled 34 women with vestibulodynia and 21 pain-free controls. The participants underwent a nuanced exam that consisted of palpation of precisely located vulvar mucosal and pelvic muscle sites. These measurements remained highly stable when participants were reexamined after 2 weeks, with high within-examiner correlation. Vestibulodynia patients reported greater sensitivity than pain-free controls at the majority of examination sites, particularly at mucosal sites on the lower vestibule. The pain threshold measures at the lower mucosal sites were also associated with the participants' self-reported pain levels during intercourse. These mucosal pain threshold measurements were used to discriminate between vestibulodynia cases and controls with high sensitivity and specificity. This data supports the feasibility of contemporaneous assessment of vulvar mucosa and underlying musculature in the pelvic region, offering the hope of a more precise case definition for vestibulodynia and related disorders.

PERSPECTIVE

This study describes performance characteristics of novel methodologies for assessing pelvic muscle and mucosal sensitivity. These pain sensitivity measures were reproducible and associated with subjective pain reports and vestibulodynia case status and represent an important step toward a more precise case definition for vestibulodynia and related disorders.

Measuring treatment outcomes in women with vulvodynia

Vulvodynia or vulvar pain syndrome is a chronic, heterogeneous, and multifactorial gynecological condition with an estimated prevalence of 9 - 12%, broad and substantial effect on quality of life due to physical disabilities, psychological distress and sexual dysfunction. A rationale therapeutic approach for the treatment of vulvodynia is still under investigation. A review of treatment modalities proposed by most of the clinicians involved in managing these patients advocated initially utilizing non-invasive therapies and then to proceed gradually to more aggressive therapies. A multidisciplinary approach that includes behavioral science and neuroimaging is required and recommended. Additionally a team approach should be utilized to test and evaluate therapies including pelvic floor physiotheraphy, psychotherapy, microbiology and pharmacology. It is my hope that this review will assist in the understanding of vulvodynia and its measuring treatment outcomes and will provide a thrust in the right direction to once and for all clarify this complex multifactorial disorder affecting women.

KEYWORDS

Treatment; Vulvodynia; Women.

The DSM diagnostic criteria for dyspareunia

The DSM-IV-TR attempted to create a unitary category of dyspareunia based on the criterion of genital pain that interfered with sexual intercourse. This classificatory emphasis of interference with intercourse is reviewed and evaluated from both theoretical and empirical points of view. Neither of these points of view was found to support the notion of dyspareunia as a unitary disorder or its inclusion in the DSM-V as a sexual dysfunction. It seems highly likely that there are different syndromes of dyspareunia and that what is currently termed "superficial dyspareunia" cannot be differentiated reliably from vaginismus. It is proposed that the diagnoses of vaginismus and dyspareunia be collapsed into a single diagnostic entity called genito-pelvic pain/penetration disorder. This diagnostic category is defined according to five dimensions: percentage success of vaginal penetration; pain with vaginal penetration; fear of vaginal penetration or of genito-pelvic pain during vaginal penetration; pelvic floor muscle dysfunction; medical co-morbidity.

Current perspectives in vulvodynia

Vulvodynia, or chronic vulvar pain, is a common but poorly understood condition. Although its etiology is not well understood, it appears to be multifactorial. As such, treatment options are targeted to reduce singular symptoms in a piecemeal fashion. A number of randomized, controlled trials have been conducted and at least one paper on combination therapy has been published; however, further systematic research is needed in order to more fully inform clinical practice.

Prevalence and correlates of depression in treatment-seeking women with vulvodynia

This study aimed to examine rates and correlates of depression in a treatment-seeking sample of women with vulvodynia. A total of 53 women were independently diagnosed with vulvodynia and assessed with state-of-the-art measures of major depressive disorder (MDD) and depressive symptom severity as well as psychometrically established measures of pain severity, general functioning, sexual function and quality of life. Current and lifetime prevalence rates for MDD were 17% (n = 9) and 45% (n = 24), respectively. Women with current MDD reported significantly greater pain severity, and worse functioning and quality of life than women without current MDD. Among those with lifetime MDD, the majority (62.5%) reported that their first depressive episode occurred before the onset of vulvodynia. Rates of current MDD appeared to be lower than rates of MDD among other samples of treatment seeking chronic pain patients. In summary, co-morbid MDD is related to greater pain severity and worse functioning among women with vulvodynia.

A randomized clinical trial for women with vulvodynia: Cognitive-behavioral therapy vs. supportive psychotherapy

Many treatments used for women with vulvodynia are based solely upon expert opinion. This randomized trial aimed to test the relative efficacy of cognitive-behavioral therapy (CBT) and supportive psychotherapy (SPT) in women with vulvodynia. Of the 50 participants, 42 (84%) completed 10-week treatments and 47 (94%) completed one-year follow-up assessments. Mixed effects modeling was used to make use of all available data. Participants had statistically significant decreases in pain severity (p's<0.001) with 42% of the overall sample achieving clinical improvement. CBT, relative to SPT, resulted in significantly greater improvement in pain severity during physician examination (p=0.014), and greater improvement in sexual function (p=0.034), from pre- to post-treatment. Treatment effects were well maintained at one-year follow-up in both groups. Participants in the CBT condition reported significantly greater treatment improvement, satisfaction and credibility than participants in the SPT condition (p's<0.05). Findings from the present study suggest that psychosocial treatments for vulvodynia are effective. CBT, a directed treatment approach that involves learning and practice of specific pain-relevant coping and self-management skills, yielded better outcomes and greater patient satisfaction than a less directive approach.

Clinical characteristics and psychopathological profile of patients with vulvodynia: an observational and descriptive study

BACKGROUND

Vulvodynia is a fairly common dermatological symptom that often interferes with the personal, social and working activities of affected women and results in a significant loss of their quality of life. It is a persistent and tedious clinical disorder which is often resistant to conventional treatments.

OBJECTIVES

The aim of this study is to evaluate the main clinical signs, associated psychopathological disorders and outcome after antidepressant treatment of patients with vulvodynia.

METHODS

Eighty patients were included. Clinical characteristics and psychopathological profiles were determined by appropriate instruments. The improvement of clinical symptoms after combined antidepressant drug therapy was also evaluated.

RESULTS

Pain (70%), burning (63.7%), dyspareunia (57.5%) and stinging (56.2%) were the most commonly reported symptoms. Most patients (56.5%) showed anxiety, and 52.2% of them were reported as having a depression disorder. When evaluated by psychometric tools, 81.4% of patients scored >150 on the Life Event Scale, which means a risk >50% of suffering an illness in the near future, and patients' scores in the Dermatology Life Quality Index showed higher values than the mean of the Spanish validation group. After 6 months of combined treatment with escitalopram (10-20 mg/day), perfenazine (2-4 mg/day) and amytriptiline (10 mg/day), a complete remission of the clinical symptoms was achieved in 41% of patients. In contrast, only 12% of patients who did not follow drug treatment reported a complete resolution of the clinical symptoms.

CONCLUSIONS

Our results seem to confirm that vulvodynia is associated with psychiatric co-morbidity such as stress and depression. The study highlights that the psychiatric treatment may be a useful option to improve clinical symptoms. Whether these patients should be evaluated for depression or be referred to a psychiatrist, remains to be investigated.

Reliability and Validity of Self-Reported Symptoms for Predicting Vulvodynia

OBJECTIVE

To evaluate the reliability and validity of self-reported symptoms to predict vulvodynia, compared with examination-based confirmation.

METHODS

Between August 5, 2004, and December 13, 2004, 1,046 members of the University of Michigan Women's Health Registry were surveyed regarding the presence of symptoms suggestive of vulvodynia. Diagnoses of vulvodynia and of control status based on survey responses were made, and a subset of these respondents was evaluated in the office.

RESULTS

One thousand forty-six of 1,447 (72.3%) eligible women, aged 19 to 92 years, completed the survey. Seventy-nine (7.6%) of the survey respondents who reported ongoing vulvar pain lasting more than 3 months were predicted to have vulvodynia, while women reporting no current pain with intercourse and no history of prolonged vulvar pain were predicted to be controls (N = 543). Agreement between the history taken at the office and that reported on the survey was very good (reliability: Cohen's kappa = 0.86, 95% confidence interval 0.73-0.99). Of the 28 women predicted to have vulvodynia who were examined in the office, 27 (96.4%) were confirmed to have vulvodynia, and 28 of the 34 (82.4%) asymptomatic women examined did not have increased vulvar sensitivity (Cohen's kappa = 0.78, 95% confidence interval 0.64-0.92).

CONCLUSION

Excellent reliability and validity of survey responses for predicting vulvodynia were demonstrated.

LEVEL OF EVIDENCE

II-2.

Using the International Continence Society's definition of painful bladder syndrome

OBJECTIVES

To determine what proportion of patients with recent-onset interstitial cystitis (IC)/painful bladder syndrome (PBS) met the International Continence Society (ICS) definition and how those who met the definition differed from those who did not.

METHODS

We recruited women who had recent-onset IC/PBS for an ongoing case-control study to identify its risk factors and studied our first 138 eligible patients to identify those who met the ICS definition. We then compared those who met the definition with those who did not by variables acquired from interviews and medical records.

RESULTS

The 138 participants had intensities of pain, urgency, frequency, and nocturia, as well as O'Leary-Sant Symptom Index scores, similar to those of previously reported patients with IC/PBS. Six percent of cystoscopies demonstrated Hunner's ulcers, and 89% of hydrodistensions under anesthesia revealed glomerulations. The most liberal interpretation of the ICS definition did not include 47 (34%) of our patients. Comparing these with the 91 (66%) who did meet the ICS criteria, we found that 96 of 97 clinical variables, including many generally thought to be characteristic of IC/PBS, were not significantly different between the two groups.

CONCLUSIONS

The ICS definition identified only 91 (66%) of the 138 patients whom study investigators and caregivers diagnosed as having IC/PBS. Furthermore, those who met the ICS definition did not differ in important ways from those who did not. These observations taken together suggest that the ICS definition may not be sufficiently sensitive. Minor modifications of the definition appeared to increase its sensitivity. Validation of a case definition (ie, assessing its sensitivity and specificity) would require testing it in patients with IC/PBS, as well as in patients with other diseases with similar symptoms.