. 2021 Mar 26;320(5):H2058–H2065. doi: 10.1152/ajpheart.00023.2021

Table 3.

Hierarchical regression models predicting time 2 total peripheral resistance index for the full sample and stratified by ethnicity

	b	t	P	r	r_partial	b	t	P	r	r_partial	b	t	P	r	r_partial
A: Full sample	Model 1 (R² = 0.219)					Model 2 (R²_change = 0.027)					Model 3 (R²_change = 0.009)
Age _T1	0.088	1.83	0.068	0.212	0.094	0.083	1.75	0.080	0.212	0.090	0.066	1.39	0.165	0.212	0.072
Sex	−0.042	−0.90	0.370	0.039	−0.046	−0.019	−0.41	0.683	0.039	−0.021	−0.018	−0.38	0.702	0.039	−0.020
Ethnicity	0.286	5.98	<0.001	0.351	0.294	0.248	5.14	<0.001	0.351	0.256	0.250	5.21	<0.001	0.351	0.260
BMI _T1	0.264	5.38	<0.001	0.347	0.267	0.268	5.56	<0.001	0.347	0.275	0.266	5.55	<0.001	0.347	0.275
Father’s education _T1	−0.043	−0.90	0.368	−0.186	−0.046	−0.040	−0.84	0.402	−0.186	−0.043	−0.039	−0.84	0.403	−0.186	−0.043
Smoking _T1	0.047	1.00	0.316	0.053	0.052	0.049	1.07	0.285	0.053	0.055	0.045	0.98	0.326	0.053	0.051
TPI _T1						0.171	3.69	<0.001	0.233	0.187	0.189	4.04	<0.001	0.233	0.204
HF-HRV _T1											−0.096	−2.08	0.038	−0.081	−0.107
B: EAs	Model 1 (R² = 0.131)					Model 2 (R²_change = 0.034)					Model 3 (R²_change = 0.024)
Age _T1	0.044	0.57	0.567	0.149	0.044	0.047	0.63	0.532	0.149	0.048	0.029	0.39	0.701	0.149	0.030
Sex	−0.028	−0.38	0.703	0.019	−0.029	−0.013	−0.17	0.862	0.019	−0.013	−0.014	−0.19	0.847	0.019	−0.015
BMI _T1	0.326	4.13	<0.001	0.344	0.300	0.332	4.27	<0.001	0.344	0.311	0.320	4.15	<0.001	0.344	0.303
Father’s education _T1	0.010	0.13	0.897	−0.091	0.010	0.017	0.23	0.816	−0.091	0.018	0.008	0.12	0.907	−0.091	0.009
Smoking _T1	0.099	1.37	0.173	0.136	0.104	0.107	1.50	0.137	0.136	0.114	0.097	1.37	0.174	0.136	0.104
TPI _T1						0.185	2.64	0.009	0.167	0.198	0.214	3.03	0.003	0.167	0.226
HF-HRV _T1											−0.159	−2.22	0.028	−0.166	−0.168
C: AAs	Model 1 (R² = 0.110)					Model 2 (R²_change = 0.029)					Model 3 (R²_change = 0.003)
Age _T1	0.121	1.77	0.079	0.186	0.124	0.112	1.66	0.099	0.186	0.116	0.100	1.45	0.150	0.186	0.102
Sex	−0.050	−0.72	0.475	−0.035	−0.050	−0.020	−0.28	0.777	−0.035	−0.020	−0.018	−0.26	0.795	−0.035	−0.018
BMI _T1	0.258	3.73	<0.001	0.288	0.254	0.261	3.83	<0.001	0.288	0.261	0.262	3.84	<0.001	0.288	0.263
Father’s education _T1	−0.080	−1.18	0.240	−0.133	−0.083	−0.079	−1.18	0.238	−0.133	−0.083	−0.076	−1.14	0.257	−0.133	−0.080
Smoking _T1	0.012	0.17	0.865	0.048	0.012	0.012	0.18	0.857	0.048	0.013	0.012	0.17	0.864	0.048	0.012
TPI _T1						0.174	2.61	0.010	0.179	0.182	0.186	2.72	0.007	0.179	0.190
HF-HRV _T1											−0.057	−0.83	0.406	−0.059	−0.059

This table depicts hierarchical regression models predicting total peripheral index at time 2 (T2) in all individuals. Table 3A give regression statistics for the full sample, and Table 3, B and C present regression statistics in European Americans (EAs) and African Americans (AAs). Age measured in years, BMI, body mass index, kg/m²; HF-HRV, natural log transformed high frequency heart rate variability; TPI, total peripheral index; T1, time 1. Significant predictors (P < 0.05) are bold at each step.