Abstracts Book 2023

Introduction: Patients with urolithiasis undergo regular follow-up. PROM based follow up using the USIQoL would be innovative and resource friendly, if matches traditional outcomes. We undertook a study to assess the feasibility of using the USIQoL as a tool for virtual follow-up. Patients (or Materials) & Methods: The study involved 2 phases. The 1st phase was the development of the USIQoL based model using existing data. The 2nd phase involved prospective, single-blind application of the model (for outpatient follow-up), over a 12 months. The outcomes were need for intervention or not, based on clinical/radiological data. We assessed correlation between the USIQoL scores and clinical outcomes, and also formulated potential USIQol cut-off scores which could be used to discriminate between intervention/no intervention (i.e., follow-up only). This was done using Binomial Logistic regression (BLR), ROC curves and Youden Index. Results: 441 patients [average age group 46-64, M=298, F=143]. The relationship between USIQoL scores and clinical outcome was statistically significant [BLR: PPH exp(B) 1.148, p <0.001, 95% CI 1.063-1.240; PSH exp (B) 1.179, p 0.025, 95% CI 1.020-1.363]. The chosen cut-off scores were PPH 8 and PSH 10. Application of the model with the cut-offs demonstrated appropriate sensitivities and specificities [PPH sensitivity 0.861, specificity 0.400; PSH sensitivity 0.861, specificity 0.420]. Conclusions: This novel feasibility study demonstrates the potential of the USIQoL to be used as an aid to virtual follow-up using the proposed cut-off scores. This could transform outpatient care of patients with urinary calculi. Further larger scale study will confirm our findings.