Patient-reported passage of kidney stone may not have acceptable accuracy: Study

Key findings of the study include:

• Of the 212 patients 105 (49.5%) had successful spontaneous stone passage at a mean followup of 17.6 days.
• Compared to the unsuccessful spontaneous stone passage group, those with successful spontaneous stone passage had significantly smaller (mean 5.4 vs 7.6 mm), more distal (71.4% vs 34.6%) stones with slightly longer average time to followup at first visit (19.2 vs 16.0 days).
• There was more patient reported cessation of pain (77.1% vs 44.9%) and perceived stone passage (55.2% vs 13.1%) in this group.
• Cessation of pain was 79.7% sensitive and 55.8% specific for successful spontaneous stone passage.
• Patient reported stone passage was 59.3% sensitive and 87.0% specific.
• In the multivariable logistic regression analysis cessation of pain (OR 4.02) and reported stone passage (OR 3.79) were independent predictors of successful spontaneous stone passage.