Can a simple question predict prolonged uroflow lag times in children?

We have been able to show a high degree of sensitivity in male patients and a high degree of specificity in female patients that a simple question, “Do you get dizzy on rising in the morning or with rapid standing?”, is a reliable marker for BND in children. We have also seen that there is an association between dizziness and psychiatric problems in patients and in family members. It appears from our results and the available literature that autonomic dysfunction is commonly associated with BND and dizziness can be a simple proxy question to identify this problem.Table. Prevalence, sensitivity and specificity of dizziness occurring in association with prolonged lag times.Estimated value95% Confidence intervalLower limitUpper limitFemalesPrevalence0.1280.080.20Sensitivity0.690.410.88Specificity0.910.830.95Likelihood ratios: Positive7.53.814.7Likelihood ratios: Negative0.340.170.71MalesPrevalence0.140.080.23Sensitivity0.920.60.99Specificity0.80.690.88Likelihood ratios: Positive4.582.827.43Likelihood ratios: Negative0.100.020.68