Clinical parameters

Control group (30 cases)

Experimental group (75cases)

P

M/F (case)

20/10

42/33

0.285

Age ( $\overline{x}$ ± s, y)

71.13 ± 6.39

69.31 ± 5.418

0.450

Smoke (Y/N)

18/12

42/33

0.764

Diabetes (Y/N)

14/16

18/57

0.104

Blood pressure levels (1 and 2 Level/3 Level)

18/12

58/17

0.178

Anti-hypertension drugs (≤2/>2 kinds)

9/6

34/11

0.247