Table 3.

Adjusted Odds Ratios for Associations Between the TyG and the Risk of Kidney Stone in NHANES 2007–2018

Characteristic	Univariate Analysis		Basic Model		Core Model		Extended Model
	aOR (95% CI)	P value	aOR (95% CI)	P value	aOR (95% CI)	P value	aOR (95% CI)	P value
Before PSM
TyG
Low group	1.00 (Reference)	<0.001	1.00 (Reference)	<0.001	1.00 (Reference)	0.003	1.00 (Reference)	0.038
High group	1.65 (1.47–1.85)		1.43 (1.27–1.61)		1.21 (1.07–1.36)		1.14 (1.01–1.30)
HOMA-IR
Low group	1.00 (Reference)	<0.001	1.00 (Reference)	<0.001	1.00 (Reference)	0.015	1.00 (Reference)	0.145
High group	1.51 (1.35–1.70)		1.41 (1.25–1.58)		1.18 (1.03–1.34)		-
After PSM
TyG
Low group	1.00 (Reference)	0.008	1.00 (Reference)	0.008	1.00 (Reference)	0.008	1.00 (Reference)	0.026
High group	1.24 (1.06–1.44)		1.24 (1.06–1.44)		1.24 (1.06–1.44)		1.19 (1.02–1.38)
HOMA-IR
Low group	1.00 (Reference)	0.001	1.00 (Reference)	0.001	1.00 (Reference)	0.252	1.00 (Reference)	0.275
High group	1.30 (1.11–1.52)		1.30 (1.11–1.52)		-		-

Notes: Adjusted covariates: Basic model: age, gender; Core model: basic model plus race, education levels, marital status, and BMI; Extended model: core model plus diabetes, hypertension, vigorous recreational activities, moderate recreational activities, blood urea nitrogen, creatinine, and uric acid.

Abbreviations: CI, confidence interval; aOR, adjusted odds ratio; PSM, propensity score matching.