Table 4.

a) Probability of stone formation (Psf) in an extended cohort of 330 patients (median, interquartile range); b) Influence of low-salt low-calcium diet on Psf in the cohort of 215 patients with dietary intervention

a
Factor	CaOx	CaP	UA	CaOx/CaP	UA/CaOx	p-value
N	200	22	13	89	6
PSF CaOx,	0.25 (0.07, 0.68)	0.38 (0.10, 0.50)	0.03 (0.01, 0.21)	0.21 (0.08, 0.67)	0.13 (0.02, 0.17)	0.039
PSF CaP	0.5 (0.24, 0.72)	0.87 (0.75, 0.95)	0.23 (0.17, 0.32)	0.68 (0.45, 0.88)	0.28 (0.00, 0.49)	<0.001
PSF UA	0.00 (0.00, 0.00)	0.00 (0.00, 0.00)	0.00 (0.00, 0.00)	0.00 (0.00, 0.00)	0.00 (0.00, 0.00)	0.68
PSF CaOx/CaP,	0.33 (0.07, 0.73)	0.59 (0.24, 0.76)	0.10 (0.04, 0.32)	0.49 (0.12, 0.78)	0.08 (0.00, 0.16)	0.025
PSF UA/CaOx,	0.00 (0.00, 0.00)	0.00 (0.00, 0.00)	0.00 (0.00, 0.00)	0.00 (0.00, 0.00)	0.00 (0.00, 0.00)	0.73
b
Stone type		Delta (95%, CI)			p-value
CaOx		−0.06 (−0.10,-0.01)			0.02
CaP		−0.09 (−0.13,-0.05)			<0.001
Uric acid (UA)		0.02 (0.00,0.05)			0.06
UA/CaOx		0.02 (−0.01,-0.05)			0.11
CaOx/CaP		−0.06 (−0.11,-0.01)			0.03

CaOx calcium oxalate, CaP calcium phosphate, UA uric acid, CaOx/CaP mixed calcium oxalate and calcium phosphate, UA/CaOx mixed uric acid and calcium oxalate, CI confidence interval