Table 2.

Unadjusted Average Dietary Intake from three 24-hour dietary recalls of Adolescents with Incident Calcium Kidney Stones and Healthy Controls

Daily Intake	Cases	Controls	p-value
Zinc (mg)	8.2 (3.1)	10.0 (4.1)	0.03
Males*	9.1	12.9
Females	7.8	8.6
Phytate (mg)	444 (173)	601 (255)	< 0.001
Total Protein (g)	63.5 (20.2)	67.9 (21.4)	0.23
Animal Protein (g)	41.2 (17.6)	41.5 (15.8)	0.83
Vegetable Protein (g)	22.3 (5.6)	26.5 (9.5)	0.03
Calcium (mg)	1,041 (363.8)	1,120 (421)	0.36
Sodium (mg)	3,138 (839)	3,091 (926)	0.80
Oxalic Acid (mg)	97.7 (69.9, 128.6)	110.9 (87.5, 148.7)	0.06
Fructose (g)	20.1 (13.0)	22.7 (11.7)	0.33
Water (mL)	2,166 (679)	1,915 (674)	0.46
Energy (kcal)	1,749 (433.0)	1,875 (542)	0.32

Data are presented as mean (SD) or median (interquartile range) unless otherwise indicated. Variables with median (interquartile range) have non-normal distributions.

^*The recommended daily zinc intake for boys and girls aged 14–18 years is 11mg and 9mg, respectively