Table 4.

Multivariate linear regression analysis of association of resting heart rate (HR) and root-mean-square of R-R interval successive difference with the MINI suicidal scale.

	Unstandardized beta	SE	Standardized beta	t	P
Model 1: HR as an independent variable
HR	0.021	0.010	0.049	2.085	0.037
Age	−0.037	0.010	−0.090	−3.742	<0.001
Sex	0.431	0.264	0.038	1.634	0.102
HAM-D score	0.291	0.032	0.361	9.167	<0.001
HAM-A score	−0.063	0.028	−0.082	−2.254	0.024
Primary diagnosis, MDD	2.621	0.312	0.220	8.388	<0.001
Primary diagnosis, bipolar disorder	4.267	0.529	0.193	8.065	<0.001
Model 2: RMSSD as an independent variable
RMSSD	−0.032	0.011	−0.070	−2.968	0.003
Age	−0.049	0.010	−0.120	−4.910	<0.001
Sex	0.392	0.264	0.0.35	1.486	0.138
HAM-D score	0.293	0.032	0.364	9.288	<0.001
HAM-A score	0.066	0.028	−0.085	−2.342	0.019
Primary diagnosis, major depressive disorder	2.611	0.312	0.220	8.367	<0.001
Primary diagnosis, bipolar disorder	4.271	0.528	0.194	8.086	<0.001

MINI, Mini-International Neuropsychiatric Interview; HR, resting state heart rate; SE, standard error; HAM-D, Hamilton depression scale; HAM-A, Hamilton anxiety scale; RMSSD, root mean square of R-R interval of successive differences.