—Acceptable diagnostic accuracy (variables with strongest clinical utility based on an AUC of ≥0.80) with FMU_SG at selected time intervals, with corresponding AUC, SN, SP, respective classification criteria, and +LR. Panel a represents an 800 mOsm/kg uOsm threshold. Panels b and c represent a 500 mOsm/kg uOsm threshold. Panel d represents the 1.017 uSG threshold. AUC = area under the receiver operating characteristic curve; SN = sensitivity; SP = specificity; uOsm = urine osmolality; uSG = urine specific gravity; uCol = urine color; +LR = positive likelihood ratios.

Citation: International Journal of Sport Nutrition and Exercise Metabolism 33, 5; 10.1123/ijsnem.2022-0203