Table 2.

Baseline characteristics of the study participants stratified by BRI quartile

	Categories	Model 1		Model 2		Model 3		Model 4
		β(95%CI)	P-value	β(95%CI)	P-value	β(95%CI)	P-value	β(95%CI)	P-value
biological age	BRI	2.16 (1.97, 2.34)	< 0.001	0.59 (0.54, 0.63)	< 0.001	0.58 (0.53, 0.62)	< 0.001	0.37 (0.33, 0.42)	< 0.001
	BRI Quartile
	Q1	0(Ref)		0(Ref)		0(Ref)		0(Ref)
	Q2	8.30 (7.53, 9.07)	< 0.001	1.09 (0.87, 1.31)	< 0.001	1.10 (0.87, 1.32)	< 0.001	0.87 (0.64, 1.09)	< 0.001
	Q3	12.24 (11.30, 13.18)	< 0.001	2.01 (1.78, 2.25)	< 0.001	1.97 (1.73, 2.20)	< 0.001	1.40 (1.17, 1.63)	< 0.001
	Q4	14.21 (13.26, 15.16)	< 0.001	3.35 (3.10, 3.61)	< 0.001	3.31 (3.06, 3.55)	< 0.001	2.11 (1.86, 2.35)	< 0.001
	P for trend		< 0.001		< 0.001		< 0.001		< 0.001
biological aging		OR (95%CI)	P-value	OR (95%CI)	P-value	OR (95%CI)	P-value	OR (95%CI)	P-value
	BRI	1.20 (1.17, 1.22)	< 0.001	1.33 (1.30, 1.37)	< 0.001	1.33 (1.30, 1.37)	< 0.001	1.25 (1.22, 1.28)	< 0.001
	BRI Quartile
	Q1	1(Ref)		1(Ref)		1(Ref)		1(Ref)
	Q2	1.32 (1.19, 1.46)	< 0.001	1.77 (1.57, 1.99)	< 0.001	1.80 (1.59, 2.04)	< 0.001	1.69 (1.33, 1.76)	< 0.001
	Q3	1.73 (1.54, 1.94)	< 0.001	2.77(2.42, 3.16)	< 0.001	2.78 (2.42, 3.20)	< 0.001	2.34 (1.82, 2.43)	< 0.001
	Q4	2.68 (2.38, 3.02)	< 0.001	5.07(4.41, 5.82)	< 0.001	5.11 (4.47, 5.85)	< 0.001	3.52 (2.74, 3.69)	< 0.001
	P for trend		< 0.001		< 0.001		< 0.001		< 0.001

BRI Body Roundness Index, PIR Poverty income ratio, CVD Cardiovascular disease, DM Diabetes mellitus, DII Dietary Inflammatory Index, Asc Ascorbic Acid, OR Odds ratio, CI Confidence interval, β Coefficient

Model 1: not adjusted

Model 2: adjusted for age, sex, and race

Model 3: adjusted for model 2, additionally adjusted for marital status, PIR, educational level, smoking status, alcohol intake, and physical activity

Model 4: adjusted for model 3, additionally adjusted for CVD, Hypertension, DM, Dietary fiber, DII, Zinc intake, Asc intake