Table 4.

Threshold effect analysis of total bilirubin concentration son mean telomere length using piece-wise linear regression.

	Mean telomere length (β (95% CI)) adjusted∗	P value
Total bilirubin, mg/dL
<0.5	0.23 (0.14, 0.32)	<0.001
≥0.5	0.01 (-0.01, 0.04)	0.346

^∗Adjusted model adjust for age (continuous), race (non-Hispanic white, black, Mexican American, other Hispanic, other race/ethnicity or missing), education (less than high school, high school, more than high school, or missing), body mass index (<18.5, 18.5- <25, 25- <30, ≥30, or missing), smoke status (none, past, current, or missing), alcohol (yes, no, or missing), physical activity (no aerobic activity, low activity, moderate activity, high activity, or missing), energy intake (Q1-Q4), diabetes (yes, no, or missing),, hypertension (yes, no, or missing), and C-reactive protein (Q1-Q3).