Table 4. Distribution of the concentrations of minerals, and urinary concentrations of biochemical parameters across cases and controls.

†Mann-Whitney test for independent samples

Variables	Cases	Cases median (interquartile range)	Controls	Controls median (interquartile range)	P value
Urinary calcium	200.5	128.2-315.5	211.5	188.7-290.8	0.43
Urinary uric acid	252.0	145.5-335.0	215.0	163.7-287.0	0.19
Urinary citrate	3.0	2.45-3.9	2.7	2.3-3.2	0.19