Methods: 45 patients with urinary incontinence treated at the Uroginecology Ambulatory Service of the Hospital de Clínicas de Porto Alegre were included. The patients had been submitted to vaginal palpation using the Oxford score, assessed by a skilled physical therapist, and to the compression force measurement by means of an air filled ballonet connected to a pressure transducer. The two evaluations had been carried in the same day.