Table 2.

Characteristics of total subjects^* according to different age groups.

Variables	Age			P	Total
	45–65 years	65–80 years	≥80 years
n	129	111	72		312
Age, year	55.8±5.7	71.9±4.6	85.1±3.8	0.000	68.3±12.6
Male, n (%)	97 (75.2)	59 (53.2)	41 (56.9)	0.001	197 (63.1)
Systolic BP, mmHg	130.7±15.0	136.6±17.5	140.1±19.2	0.000	135.0±17.3
Diastolic BP, mmHg	79.3±9.15	75.3±9.6	74.0±11.2	0.000	76.6±10.0

^*Variables are presented as mean±SD or n (%).