Table 5.

OR of kidney stone according to DSI and DPI as continuous, categorical, or binary variables in the multivariate regression model.

		OR (95% CI)	p Value
DSI
Continuous variable		0.99 (0.99–1.00)	0.2
Categorial variable	Quartile 4 vs. 1	0.84 (0.68–1.04)	0.1
	Quartile 3 vs. 1	1.05 (0.85–1.30)	0.6
	Quartile 2 vs. 1	0.95 (0.79–1.10)	0.6
≤2300 mg vs. >2300 mg		1.10 (0.93–1.20)	0.3
DPI
Continuous variable		0.99 (0.99–0.99)	0.02
Categorial variable	Quartile 4 vs. 1	0.75 (0.60–0.94)	0.01
	Quartile 3 vs. 1	0.82 (0.67–1.01)	0.06
	Quartile 2 vs. 1	0.82 (0.68–0.97)	0.02
>3500 mg vs. ≤3500 mg		0.87 (0.72–1.04)	0.1
DSI/DPI
Continuous variable		1.10 (1.01–1.20)	0.03
Categorial variable	Quartile 4 vs. 1	1.30 (1.10–1.70)	0.008
	Quartile 3 vs. 1	1.20 (0.99–1.40)	0.06
	Quartile 2 vs. 1	1.20 (0.91–1.50)	0.2
>0.6 vs. ≤0.6		1.20 (0.86–1.67)	0.3

Abbreviations: DSI, dietary sodium intake. DPI, dietary potassium intake.