Added predictive value of urinary biomarker score on top of age, sex, and eGFR (a; n = 146; AUC 0.67 [0.58–0.75] vs. 0.73 [0.65–0.81], p = 0.049) and predictive value of urinary biomarker score compared to Mayo htTKV classification or PROPKD score (b; n = 115; AUC 0.73 [0.64–0.82] vs. 0.61 [0.51–0.71], p = 0.04 or 0.65 [0.55–0.75], p = 0.18 respectively). eGFR, estimated glomerular filtration rate; htTKV, height-adjusted total kidney volume; PROPKD, predicting renal outcomes in ADPKD.