TABLE 3.

Mean values and 95% confidence intervals (CIs) of HRV across tertiles of leptin

	Tertiles of leptin
	First tertile 16–5,781 (n=129)	Second tertile 5,806–13,123 (n=130)	Third tertile 13,128–91,581 (n=129)	P-value
High frequency
Model 1	172.7 (141.5–210.9)	148.4 (121.6–181.1)	116.4 (95.3–142.1)	0.087
Model 2	166.4 (137.9–200.7)	147.4 (122.3–177.6)	121.7 (100.8–146.8)	0.144
Model 3	172.5 (142.4–209.0)	149.2 (124.0–179.6)	112.8 (93.2–136.5)	0.028
Low frequency
Model 1	238.9 (204.4–279.2)	232.2 (198.8–271.3)	154.1 (131.9–180.2)	<0.001
Model 2	233.3 (200.8–271.1)	231.2 (199.2–268.4)	158.5 (136.4–184.2)	<0.001
Model 3	231.9 (198.4–271.2)	231.2 (198.8–269.0)	159.4 (136.4–186.2)	0.001

HF and LF HRV were first log-transformed for analysis, and then the results were back-transformed for reporting. P-values were obtained from linear regression models. Model 1: unadjusted; Model 2: adjusted for age; and Model 3: adjusted for age, gender, and race/ethnicity.