Table 2.

Description of the Multivariate Linear Regression Models Considering QT-RR Slope as Outcome When Comparing the Groups of LQT-1 Patients With Mutation Inside the C-Loop Regions (CL QT-1) or Outside These Regions (NCL QT-1)

	Diurnal Period			Nocturnal Period
	Coefficient	95% CI	P value	Coefficient	95% CI	P value
Groups (NCL QT-1:1 vs CL QT-1:2)	0.063	0.019–0.108	0.0059	0.003	−0.014 to 0.007	0.194
Sex (male: 1 vs female: 2)	0.058	0.015–0.100	0.0093	0.002	−0.021 to 0.067	0.305
RR, ms	−0.0000	−0.0000 to 0.0000	0.974	−0.0002	−0.0004 to 0.0000	0.048
QTc, ms	0.0002	−0.0005 to 0.0011	0.530	0.0006	−0.0001 to 0.0013	0.136
RMSSD, ms	−0.0006	−0.0020 to 0.0007	0.385	−0.0004	−0.0012 to 0.0004	0.340
SDNN, ms	0.0006	0.0002–0.0014	0.137	0.0004	−0.0005 to 0.0001	0.416
Age, y	0.0010	−0.0005 to 0.0025	0.195	−0.0000	−0.00016 to 0.0001	0.898