Table 1 Baseline characteristics of study participants (N = 167)
Characteristic |  < 65 years (N = 79) |  ≥ 65 years (N = 88) | Total (N = 167) |
|---|---|---|---|
Sex, n (%) | |||
 Male | 26 (32.9) | 47 (53.4) | 73 (43.7) |
Age, years, n (%) | |||
 Mean (SD) | 47.3 (13.7) | 70.9 (6.0) | 59.7 (15.7) |
 Median (range) | 53 (23–64) | 69 (65–89) | 65 (23–89) |
Comorbid diseases, n (%) | |||
 Hypertension | 15 (19.0) | 51 (58.0) | 66 (39.5) |
 CHD | 6 (7.6) | 15 (17.0) | 21 (12.6) |
 Diabetes | 5 (6.3) | 19 (21.6) | 24 (14.4) |
 Hyperlipidemia | 10 (12.7) | 40 (45.5) | 50 (29.9) |
 IV history | 25 (31.6) | 26 (29.5) | 51 (30.5) |