Table 2 Demographics and risk factor characteristic in patient population, NÂ =Â 200
|  | Total sample | Patients test retest n = 134 |
|---|---|---|
Age mean (SD) | 72 (9.5) | 71 (7.8) |
Sex n (%) | ||
 Male/female | 111 (55)/89 (45) | 71 (53)/63 (47) |
Severity of disease n (%) | ||
 Claudication | 29 (15) | 20 (15) |
 Critical ischemia | 141 (70) | 94 (70) |
 Othera | 14 (7) | 11 (8) |
 Missing | 16 (8) | 9 (7) |
Type of intervention n (%) | ||
 Open surgery | 46 (23) | 36 (27) |
 Endovascular | 134 (67) | 84 (63) |
 Combination open/endovascular | 9 (4) | 8 (6) |
 Missing | 11 (6) | 6 (4) |
Risk factors n (%) | ||
 Smoking current/previous | 29 (14)/61(30) | 20 (15)/42 (31) |
 Hypertension | 111 (55) | 36 (27) |
 Cardiac disease | 57 (28) | 75 (56) |
 Diabetes | 60 (30) | 36 (27) |
 Renal disease | 25 (13) | 28 (21) |
 Chronic pulmonary disease | 33 (16) | 15 (11) |
 Missing | 24 (12) | 16 (12) |