Table 2.

Characteristics of all PH patients and the PH1 subgroup with or without nephrocalcinosis.

	PH		PH1
	Without NC (N=156)	With NC (N=79)	Without NC (N=101)	With NC (N=69)
Gender
Male/Female	86/70	45/34	54/47	39/30
Age, yrs
at diagnosis	9.3 (4.5, 24.7)	4.4 (1.8, 10.0)*	11.5 (5.6, 30.7)	4.2 (1.9, 9.4)*
at last follow up	22.7 (10.1, 44.7)	15.4 (5.8, 23.9)*	25.7 (13.2, 44.8)	15.1 (5.8, 22.6)*
Stone events, /yr	0.18 (0.06, 0.47)	0.27 (0.00, 0.52)	0.16 (0.05, 0.45)	0.28 (0.00, 0.59)
Stones per image	2.0 (0.8, 4.0)	3.0 (1.5, 6.1)#	2.6 (1.0, 4.0)	3.8 (1.7, 6.8)#
P[ox], µmol/L	4.6 (2.7, 12.0)	8.7 (3.7, 17.5)#	6.6 (3.0, 15.6)	8.8 (4.1, 17.6)
U[ox], mmol/24ha	1.3 (0.9, 1.9)	2.0 (1.3, 2.6) *	1.3 (0.9, 2.1)	2.0 (1.3, 2.6) *
U[Ca], mg/24ha	90.2 (59.2, 149.2)	63.0 (43.4, 90.9) *	79.2 (51.5, 112.7)	55.6 (39.9, 85.7) *
U[citrate], mg/24ha	445 (264, 750)	346 (190, 608)	336 (210, 643)	294 (183, 490)
U[volume], L/24ha	2.4 (1.9, 3.1)	2.8 (2.2, 3.6)	2.4 (1.8, 3.2)	2.8 (2.3, 3.6)

Patients who had ESKD before first image were excluded in the analysis. All plasma and urinary results were the average of all values prior to ESKD. Gender is expressed as number and statistical analysis was made by Chi-Square. The rest are expressed as median (interquartile range) and statistical analysis was made by rank sum test.

^aadjusted by body surface area;

^*P<0.01;

^#P<0.05