Vulvar vestibulitis syndrome: reliability of diagnosis and evaluation of current diagnostic criteria.

OBJECTIVE: To assess the reliability of the diagnosis of vulvar vestibulitis as defined by Friedrich and to evaluate the usefulness of Friedrich's criteria in the diagnostic process.
METHODS: In a university hospital, 146 women with dyspareunia had two sets of gynecologic examinations involving vulvar pain ratings, took part in structured interviews, and completed the McGill-Melzack Pain Questionnaire.
RESULTS: Kappa values for the vulvar vestibulitis diagnosis ranged from 0.66 to 0.68 for inter-rater agreement and from 0.49 to 0.54 for test-retest reliability. Mean vestibular pain ratings ranged from 2.45 at the 12 o'clock site to 7.58 at the 9-12 o'clock site; ratings for all sites correlated significantly between gynecologists. Pain in the labia majora and labia minora was minimal for both sets of examinations, with mean participant pain ratings ranging from 0 to 1.49. Gynecologists' erythema ratings did not correlate significantly with respect to either inter-rater agreement or test-retest reliability. Of Friedrich's three diagnostic criteria, only tenderness to pressure within the vulvar vestibule differentiated dyspareunia patients with and without vulvar vestibulitis. In reference to their coital pain, 88.1% of women with vulvar vestibulitis chose adjectives from the McGill-Melzack Pain Questionnaire describing a thermal quality, and 86.6% chose adjectives describing an incisive pressure sensation.
CONCLUSION: Vulvar vestibulitis can be reliably diagnosed in women with dyspareunia. Pain is limited to the vulvar vestibule and can be rated and described in a consistent fashion by these women. Erythema does not appear to be a useful diagnostic criterion.