Table 2.

The relationship between SFA, VFA, and the occurrence of stone episode.

Variables	All SFs				SFs without MetS
	Unadjusted		Adjusted¶		Unadjusted		Adjusted§
	OR (95%CI)	p	OR (95%CI)	p	OR (95%CI)	p	OR (95%CI)	p
SFA	1.159 (1.070–1.254)	< 0.001	1.150 (1.028–1.286)	0.015	1.092 (1.013–5.691)	0.047	1.131 (1.006–1.271)	0.039
VFA	1.043 (0.999–1.090)	0.058	1.014 (0.954–1.077)	0.658	0.985 (0.929–1.044)	0.614	0.991 (0.922–1.066)	0.813

^¶Adjusted for age, gender, family history of stone, MetS, and renal insufficiency.

^§Adjusted for age, gender, family history of stone, and renal insufficiency.

The binary logistic regression model was used to assess the association between the occurrence of stone episode and SFA or VFA.

OR, odds ratio; CI, confidence interval; MetS, metabolic syndrome; SF, stone former.