Table 2.

Association between oxidative balance score and serum klotho levels.

	Tertiles of OBS			P for trend	Continuous (per 1 score increase)
	T1	T2	T3
β (95%CI)
Model 1	Ref	14.73(-6.15, 35.61)	30.69(7.68, 53.70)*	0.01	2.33(0.93, 3.72)**
Model 2	Ref	24.35(1.59, 47.10)*	48.74(21.08, 76.40)***	< 0.001	4.01(2.21, 5.81)***
Model 3	Ref	15.57(-5.75, 36.90)	30.35(3.43, 57.28)*	< 0.027	2.85(1.03, 4.68)**

Model 1: age (continuous, years) and sex (female and male).

Model 2: Model 1 + race (White, Black, Hispanic, Mexican American and others), marital status (cohabiting and single), education status (less than high school, high school and more than high school), poverty income ratio (continuous) + daily energy intake (continuous, kcal/d).

Model 3: Model 2 + whole grain (continuous, g/d), milk (continuous, cup/d), red meat (continuous, oz/d), cured meat (continuous, oz/d) and egg intake (continuous, oz/d).

OBS oxidative balance score, CI confidence interval.

*P < 0.05; **P < 0.01; ***P < 0.001.