The Value of a New Symptom Score (DAN-PSS) in Diagnosing Uro-Dynamic Infravesical Obstruction in BPH

Introduction: A new type of questionnaire for BPH, the DAN-PSS symptom score system, was used in an attempt to predict infravesical obstruction determined by pressure-flow study.Patients and methods: In 50 consecutive patients a reliable questionnaire and a pressure-flow was obtained.Results: Almost none of the unobstructed patients had a total obstructed index (TOI) of more than 6, whereas this was the case in half of the obstructed patients. This difference was statistically significant.Discussion: This study indicates, that if the total obstructed index (TOI) is more than 6, the patient most likely have an infravesical obstruction.With this limit the DAN-PSS-score system can predict infravesical obstruction with a sensitivity of 42% and a specificity of 89%.Conclusion: With the new concept of combining quantity with quality in a symptom score system, a strong correlation between symptoms and objective findings has been found.