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Table 2 Urinary volume and solute concentrations in 24-h urine samples of the four study groups

From: Effect of sample time on urinary lithogenic risk indexes in healthy and stone-forming adults and children

  Adults Children
Healthy Stone formers p-value Heatlhy Stone formers p-value
Volume (mL/24 h) 1573 (1189–2173) 1778 (1250–2380) 0.089 876 (672–1180) 1100 (645–1707) 0.111
Creatinine (mg/L) 919 (648–1230) 804 (571–1098) 0.106 970 (763–1294) 796 (565–1245) 0.007
Calcium (mg/L) 106 (70–179) 124 (89–174) 0.166 72 (45–120) 130 (72–231) < 0.001
Magnesium (mg/L) 64 (44–86) 55 (43–76) 0.143 113 (77–142) 93 (52–125) 0.081
Oxalate (mg/L) 15 (12–19) 20 (14–24) 0.001 22 (17–29) 25 (22–32) 0.120
Phosphorous (mg/L) 517 (397–784) 515 (357–637) 0.207 840 (597–1063) 597 (430–768) 0.002
Uric acid (mg/L) 369 (272–513) 343 (258–481) 0.334 548 (393–691) 411 (298–606) 0.018
Citrate (mg/L) 435 (286–676) 322 (226–470) 0.003 517 (373–722) 347 (205–626) 0.005
  1. Results are expressed as median (P25-P75). Statistical comparisons are between healthy and stone-forming adults, and between healthy and stone-forming children