Table 2.

Interaction between age and insulin resistance (SSPG) in predicting systolic and diastolic blood pressure

Variable	Univariate		Multivariate		Multivariate with interaction term		p-value
	B	95% CI	B	95% CI	B	95% CI
Systolic blood pressure
Age(≥52 vs. <52)	4.31**	1.68–6.93	4.98**	2.24–7.75	−2.12	−8.86–4.60
Sex(male vs. female)	5.23**	2.58–7.88	6.36**	3.38–9.34	8.03**	6.21–9.84
Ethnicity (nonHispanic white)	1.70	−1.08–4.49	1.35	−1.57–4.26	−0.68	−2.45–1.09
BMI	0.49**	0.24–0.74	0.67**	0.18–1.16	0.04	−0.26–0.34
WC (cm)	0.22**	0.12–0.31	−0.13	−0.32–0.06	−0.06	−0.18–0.06
Heart rate (/min)	0.11	−0.03–0.25	0.11	−0.04–0.25	0.12	0.03–0.21
SSPG(mg/dL)	0.04**	0.02–0.06	0.02**	0.00–0.05	0.01	−0.003–0.03
Age* SSPG					−0.04*	0.01–0.08	0.023
Diastolic blood pressure
Age(≥52 vs. <52)	−0.006	−1.68–1.67	0.49	−1.19–2.16	−2.79	−6.88–1.31
Sex(male vs. female)	7.48**	5.92–9.05	8.03**	6.21–9.84	8.05**	6.24–9.85
Ethnicity (nonHispanic white)	−0.14	−1.90–1.62	−0.68	−2.45–1.09	−0.72	−2.45–1.09
BMI	−0.02	−0.18–0.14	0.04	−0.26–0.34	0.06	−0.24–0.35
WC (cm)	−0.02	−0.18–0.14	−0.06	−0.18–0.06	−0.06	−0.18–0.06
Heart rate (/min)	0.09*	0.01–0.18	0.12**	0.03–0.21	0.13**	0.04–0.22
SSPG(mg/dL)	0.009	−0.002–0.02	0.01	−0.003–0.03	−0.001	−0.02–0.02
Age* SSPG					0.02	−0.003–0.04	0.086

Univariate and multivariate analyses predicting systolic and diastolic BP are shown.

Last column includes the interaction term between age and SSPG.

Data are given as regression coefficients (B) and 95% confidence intervals.

^**p<0.01,

^*p<0.05