ToolsCalculators
Vesicoureteral Reflux Index (VURx)
Predicts spontaneous improvement/resolution of primary VUR in infants under 2 years.
Vesicoureteral Reflux Index (VURx)
Timing of reflux on VCUG
Sex
Highest VUR grade
Complete ureteral duplication or periureteral diverticulum
Result1 point
Approximate probability of improvement or resolution of primary VUR by this cohort's follow-up: 89 %.
- Improvement/resolution rate
- 89 %
When to use
- Counseling families of infants under 2 years with newly diagnosed primary VUR on the likelihood of spontaneous improvement or resolution.
- Supporting shared decision-making between continued surveillance/prophylaxis versus earlier surgical correction.
Formula
Sum of points: timing of reflux on VCUG (voiding phase only = 1, late filling phase = 2, early-to-mid filling phase = 3) + female sex (1) + VUR grade IV-V (1) + complete ureteral duplication or periureteral diverticulum (1). Range 1-6; reported improvement/resolution rates by score: 1 = 89%, 2 = 69%, 3 = 53%, 4 = 16%, 5-6 = 11%.
Pearls and pitfalls
- Derived in children under 2 years with primary VUR followed longitudinally with serial VCUG; not validated for older children or secondary (obstructive/neurogenic) reflux.
- Higher scores identify infants less likely to outgrow reflux and more likely to warrant earlier surgical consideration.