PURPOSE: After correction of stress incontinence, some patients experience the improvement of overactive bladder symptoms. During urodynamic study of some patients, the leak point pressure has a tendency to decrease at increasing vesical volumes. We evaluated the possibility of a correlation between stress incontinence parameters and bladder capacity or compliance. MATERIALS AND METHODS: 113 stress incontinence patients who received urodynamic study from February 2000 to August 2005, were reviewed retrospectively for this study. In these patients, urodynamic stress incontinence parameters(abdominal leak point pressure: ALPP, maximum urethral closure pressure: MUCP), Q-tip angle and Stamey symptom grade and age were analyzed for a correlation with urodynamic cystometric capacity or compliance. We also compared the cystometric capacity of each symptom grade group to assess the difference among the groups. RESULTS: The mean age of the patients was 49.5+/-10.4 years(29~75), symptom grade was I(37), II(27), III(19), Q-tip angle was 33.6+/-14.0 degrees(10~60), cystometric capacity was 390.2+/-109.7 ml(121~641), compliance was 51.6+/-30.4 ml/cmH2O(9.2~142.5), ALPP was 83.2+/-31.0 cmH2O(24~200), MUCP was 55.4+/-29.3 cmH2O(7~142). In the correlation analysis, cystometric capacity had a correlation of -0.207 with age (p=0.029) and -0.215 with symptom grade(p=0.031). However, bladder compliance had no significant correlation with any of the parameters studied. In each symptom grade, cystometric capacity was 407.0+/-103.1 cc(I), 395.8+/-103.0 cc(II), 324.5+/-124.0 cc(III)(p=0.04) and the age for each symptom grade was 48.5+/-9.7(I), 48.1+/-10.1 (II), 57.3+/-10.1(III)(p=0.005). CONCLUSION: As cystometric capacity decreased, symptom grade of stress incontinence increased and age also increased. However, there were no other correlations between cystometric capacity or compliance and stress incontinence parameters.