Table 2.

Correlation analysis of predictors and outcomes, comparing patients with truncating and with nontruncating variants

Variant group	Urine parameter	Lifetime stone events	Chronic kidney disease
Truncating group	24h urine calcium mg/d	n: 18	n: 68
n: 110		r: 0.4	r: 0.2
		P: 0.02	P: 0.11
	24h urine phosphorus m/d	n: 12	n: 32
		r: 0.6	r: 0.2
		P: 0.04	P: 0.67
	Total urine protein gram/d	n: 5	n: 43
		r: 0.1	r: 0.3
		P: 0.85	P: 0.04
	Calcium/creatinine ratio	n: 16	n:79
		r: 0.4	r: 0.1
		P: 0.07	P: 0.6
Nontruncating group	24h urine calcium mg/d	n: 8	n: 37
n: 52		r: 0.34	r: 0.13
		P: 0.46	P: 0.62
	24h urine phosphate mg/d	n: 8	n: 20
		r: 0.2	r: −0.2
		P: 0.63	P: 0.50
	Total urine protein gram/d	n: 5	n: 24
		r: −0.2	r: 0.2
		P: 0.71	P: 0.28
	Calcium/creatinine ratio	n: 33	n: 43
		r: 0.1	r: 0.1
		P: 0.5	P: 0.6

n, number; P,P-value; r, correlation coefficient.

Subjects less than 18 years of age were extrapolated to average adult size (mg/1.73 m²/ d). “CKD stage” is an ordinal variable with values ranging from 0 to 4 and has been treated as such in the analysis. “Lifetime stone events” is a continuous variable representing the actual number of stone events an individual has experienced through last follow-up.

“Chronic kidney disease” is an ordinal variable with values ranging from 0 to 4 and has been treated as such in the analysis. “Lifetime stone events” is a continuous variable representing the actual number of stone events an individual has experienced through last follow-up.