Idiopathic Recurrent Calcium Urolithiasis (IRCU): variation of fasting urinary protein is a window to pathophysiology or simple consequence of renal stones in situ? A tripartite study in male patients providing insight into oxidative metabolism as possible driving force towards alteration of urine composition, calcium salt crystallization and stone formation*

Table 5 Appendix I. Simple correlation of variables in fasting urine (U) and plasma (P) of Results, parts 1-3; n: paired observations; r: coefficient; p: level of significance

Code	Varia bles	n	r	p	Code	Variables	n	r	p
	Part 1				Continuation:
	Dependent: Log N-Alb-P
	Influential:				16	U-FE-Uric acid	186	0.18	0.015^x
1	U-MDA	170	0.35	< 0.001^x	17	U-HAP	172	0.42	< 0.001
2	U-Volume	176	0.53	< 0.001^x	18	U-Hypoxanthine	75	0.29	0.01^x
3	U-Na	181	0.39	< 0.001^x	19	U-Xanthine	75	0.50	< 0.001^x
4	U-Mg	181	0.24	0.0 01^x	20	P-Uric acid	187	-0.23	0.001
5	U-Cit	179	0.26	0.0 01^x	21	P-TAS	57	-0.28	0.03
6	U-FE-N-Alb -P	181	0.95	< 0.001^x
7	U-pH	181	0.25	0.0 01		Part 3
8	U-Hypoxanthine	75	0.40	0.0 01^x		Dependent: Log T-Ox
9	U-Xanthine	75	0.66	< 0.001^x		Influential:
10	P-Uric acid	187	-0.18	0.0 2^x	22	T-Ca	49	-0.26	0.07^x
	Part 2					Dependent: Log T-Ca
	Dependent: U-pH					Influential:
	Influential:				23	P-Uric acid	49	0.28	0.055^x
11	BMI	187	-0.27	< 0.001
12	P-Insuli n	184	-0.29	< 0.001^x		Dependent: Log (T-Ca/10² x T-Ox)
13	U-Cit	185	-0.14	0.0 5^x		Influential:
14	U-Volume	187	0.19	0.0 1^x	24	P-Uric acid	49	0.28	0.051^x
15	U-FE-N-Alb -P	181	0.26	< 0.001^x

For dimension of variables see Tables 1 (part 1), 2 (part 2), 3 (part 3); ^x: based on log data.

ISSN: 2047-783X