Table 1. Clinical characteristics of control and HT groups in two Chinese populations.

Variables	Jiangsu population (n = 1766)			Guangdong population (n = 546)
	Control (n = 886)	HT (n = 880)	p	Control (n = 277)	HT (n = 269)	p
Age, years	70.46 ± 6.50	71.11 ± 6.06	0.030	42.60 ± 10.16	47.64 ± 11.75	1.34 × 10−7
Sex (M/F)	479/407	419/461	7.74× 10−3	237/40	234/35	0.718
SBP, mmHg	126.78 ± 9.15	163.18 ± 16.15	<2.20 × 10−16	117.12 ± 10.57	141.07 ± 18.11	<2.20 × 10−16
DBP, mmHg	76.80 ± 8.16	98.46 ± 7.82	<2.20 ×  × 10−16	76.44 ± 6.97	93.88 ± 8.84	<2.20 × 10−16
PP, mmHg	49.98 ± 9.73	64.72 ± 15.11	<2.20 × 10−16	40.68 ± 8.23	47.19 ± 16.87	6.32 × 10-6
MAP, mmHg	93.46 ± 7.16	120.03 ± 8.78	<2.20 × 10−16	90.00 ± 7.38	109.61 ± 9.91	<2.20 × 10−16
Height, cm	158.89 ± 8.62	158.33 ± 8.70	0.197	166.53 ± 6.61	167.08 ± 6.97	0.349
Weight, kg	56.70 ± 9.43	59.30 ± 10.41	2.37 × 10−7	68.11 ± 9.27	73.87 ± 12.51	2.48 × 10−9
TG, mmol/L	1.32 ± 0.68	1.46 ± 0.79	8.58 × 10−5	2.24 ± 1.28	2.36 ± 1.80	0.113
TC, mmol/L	5.05 ± 0.86	5.29 ± 0.97	2.78 × 10−8	5.58 ± 1.23	5.59 ± 0.99	0.908
HDL-c, mmol/L	1.55 ± 0.42	1.59 ± 0.42	0.107	1.21 ± 0.28	1.30 ± 0.30	4.08 × 10−4
LDL-c, mmol/L	2.75 ± 0.70	2.91 ± 0.78	6.34 × 10−6	3.24 ± 0.85	3.32 ± 0.70	0.264
GLU, mmol/L	5.77 ± 0.99	6.16 ± 1.23	7.87 × 10−16	5.40 ± 1.60	5.79 ± 1.81	7.05 × 10−4

M, male; F, female; SBP, systolic blood pressure; DBP, diastolic blood pressure; PP, pulse pressure; MAP, median arterial pressure; TG, triglyceride; TC, total cholesterol; HDL-c, high density lipoprotein cholesterol; LDL-c, low density lipoprotein cholesterol; GLU, fasting blood glucose; HT, hypertensive patient. PP was calculated as SBP minus DBP, and MAP was calculated as 1/3 SBP plus 2/3 DBP. All quantitative data were presented as mean ± SD. P values < 0.05 were marked in bold.