Objective: To evaluate the clinical value of ultrasonography detecting the poster urethrovesical angle (PUVA) in diagnosis of stress urinary incontinence (SUI).
Methods: From Jan. 2006 to Dec. 2008, the PUVA in resting phase (PUVA-r) and stress phase (PUVA-s) between 84 patients with SUI and 100 healthy women were measured by color Doppler ultrasound, including 57 cases in SUI degree I, 22 cases in SUI degree II, 5 cases in SUI degree III.
Results: (1) The PUVA-r and PUVA-s were (130+/-29) degrees and (158+/-36) degrees in SUI patients, which were significantly higher (113+/-19) degrees and (115+/-23) degrees in control group (P<0.01). (2) Correlation analysis showed that PUVA-s was positively correlated with the severity of SUI (P<0.01). (3) The area under the receiver operating characteristic curves (ROC) of PUVA-s was 0.82 (95% CI: 0.76-0.89) between SUI patients and healthy women. When PUVA-s>or=140 degrees was chosed as the cut-off value, the specificity, accuracy rate and positive predictive value in diagnosis of SUI were 84%, 79%, 81%, which were significantly higher than those when cut-off value of PUVA-s>or=120 degrees (54%, 68%, 62%; P<0.05).
Conclusion: The PUVA-s in SUI patients are significantly increased and is positively correlated with the severity of SUI, which are indicated that PUVA-s>or=140 degrees should be used as cut-off value in diagnosis of SUI by ultrasonography.
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