Table 2

Multivariate linear regression analyses for associations between BP, BMI and P wave duration

	Model 1		Model 2		Model 3		Model 4
	β	P value	β	P value	β	P value	β	P value
SBP, mm Hg	0.03	<0.001	0.03	<0.001	0.02	<0.001	0.02	0.002
DBP, mm Hg	0.11	<0.001	0.09	<0.001	0.09	<0.001	0.09	<0.001
BMI, kg/m²	0.44	<0.001	0.36	<0.001	0.25	<0.001	0.25	<0.001
Age, year	0.05	0.001	0.05	0.001	0.05	0.001	0.05	0.003
Male (1) vs. Female (0)	3.11	<0.001	2.55	<0.001	2.02	<0.001	1.98	<0.001
FBG, mmol/L	–		0.04	0.614	0.04	0.603	0.04	0.608
TC, mmol/L	–		0.83	0.007	0.73	0.018	0.71	0.023
TG, mmol/L	–		−0.05	0.682	−0.02	0.843	−0.02	0.899
LDL-C, mmol/L	–		−0.36	0.312	−0.21	0.573	−0.17	0.647
HDL-C, mmol/L	–		−1.96	<0.001	−1.81	<0.001	−1.81	<0.001
SUA, mg/dL	–		0.05	0.646	0.01	0.914	0.00	0.994
Current smoker (yes/no)	–		0.02	0.949	0.13	0.663	0.10	0.751
Current drinker (yes/no)	–		1.21	0.001	1.19	0.002	1.18	0.002
Anti-arrhythmic medication (yes/no)	–		−1.83	0.263	−2.54	0.125	−2.60	0.116
Anti-hypertensive medication (yes/no)	–		1.25	0.001	1.17	0.003	1.15	0.003
Mitral stenosis/regurgitation (yes/no)	–		−0.04	0.968	−0.94	0.356	−1.12	0.273
History of MI (yes/no)	–		−0.16	0.891	−0.30	0.805	−0.33	0.785
History of HF (yes/no)	–		−1.40	0.314	−1.84	0.189	−1.89	0.179
LAD, cm	–		–		2.83	<0.001	2.66	<0.001
LVMI, g/m²	–		–		–		0.01	0.208

Model 2: additional variables including FBG, plasma lipids, SUA, smoking, drinking, education, income, anti-arrhythmic medication, anti-hypertensive medication, mitral stenosis/regurgitation, and history of MI and HF; model 3: additional variable LAD; model 4: additional variable LVMI.; Note, model 1: SBP, DBP, BMI, age, gender and race in the multivariate regression.
BMI, body mass index; BP, blood pressure; CNY, China Yuan; DBP, diastolic blood pressure; FBG, fasting blood glucose; HDL-C, high-density lipid cholesterol; HF, heart failure; IAB, interatrial block; LAD, left atrial diameter; LAE, left atrial enlargement; LDL-C, low-density lipid cholesterol; LVH, left ventricular hypertrophy; LVMI, left ventricular mass index; MI, myocardial infarction; SBP, systolic blood pressure; SUA, serum uric acid; TC, total cholesterol; TG, triglycerides.