Data were collected by the consulting physician using a standardized questionnaire, in-person interview, clinical examination, and case note review. Age at onset was defined as the age when a patient first experienced LP-related symptoms in the anogenital area. The presence or absence of vulvar and/or vaginal pruritus, burning, soreness, dyspareunia, apareunia, and vaginal discharge was recorded. Clinical examination included vaginal speculum examination except when vaginal stenosis or pain prevented this. Clinical features of the vulva, vagina, perineum, and perianal region (red and/or purple color, lacy changes, erosions, scarring, and stenosis) were noted.