Independent Influence of Blood Pressure on QTc Interval: Results from a General Chinese Population

Table 2

Multivariate linear regression for association between blood pressure and QTc interval (ms).

Group	Model 1		Model 2		Model 3
	β (95% CI)	P value	β (95% CI)	P value	β (95% CI)	P value
Total
SBP, mmHg	0.23 (0.21–0.25)	< 0.001	0.14 (0.12–0.16)	< 0.001	0.12 (0.10–0.14)	< 0.001
DBP, mmHg	0.46 (0.42–0.50)	< 0.001	0.20 (0.16–0.24)	< 0.001	0.16 (0.12–0.20)	< 0.001
Male
SBP, mmHg	0.28 (0.25–0.31)	< 0.001	0.19 (0.16–0.21)	< 0.001	0.16 (0.13–0.19)	< 0.001
DBP, mmHg	0.56 (0.51–0.62)	< 0.001	0.25 (0.20–0.30)	< 0.001	0.20 (0.14–0.25)	< 0.001
Female
SBP, mmHg	0.19 (0.16–0.22)	< 0.001	0.11 (0.09–0.14)	< 0.001	0.09 (0.07–0.12)	< 0.001
DBP, mmHg	0.37 (0.32–0.42)	< 0.001	0.15 (0.10–0.20)	< 0.001	0.12 (0.07–0.17)	< 0.001

Abbreviations as in Table 1.
Note. Model 1: adjusted for age, gender, race, SBP, and DBP; Model 2: additional adjustments for BMI, FBG, TC, TG, LDL-C, HDL-C, SUA, current smoking, drinking status, serum calcium, potassium and magnesium, heart rate, history of heart disease, and any medication used; Model 3: additional adjustments for LVMI.