Patient characteristics in the CT angiography group and the control group
| CT angiography group | Control group | p Value | |
| n=164 | n=77 | ||
| Age (years)±SD | 70±11 | 67±11 | 0.11 |
| Male, n (%) | 91 (56) | 45 (58) | 0.66 |
| History | |||
| Hypertension, n (%) | 137 (84) | 54 (70) | 0.03 |
| Diabetes mellitus, n (%) | 65 (40) | 25 (32) | 0.87 |
| Coronary artery disease, n (%) | 99 (60) | 50(65) | 0.22 |
| Atrial fibrillation, n (%) | 61 (37) | 31 (40) | 0.39 |
| Congestive heart failure, n (%) | 29 (18) | 11 (14) | 0.79 |
| Hyperlipidaemia, n (%) | 70 (43) | 38 (49) | 0.33 |
| Cigarette smoking, n (%) | 70 (43) | 35(45) | 0.41 |
| Previous use of antiplatelets, n (%) | 53 (32) | 29 (38) | 0.41 |
| Nephropathy, n (%) | 8 (5) | 4 (5) | 0.56 |
| Previous haemodialysis, n (%) | 1 (0.006) | 1 (0.01) | 0.54 |
| Admission | |||
| Admission systolic blood pressure (mm Hg)±SD | 152±26 | 157±21 | 0.16 |
| Onset-to-treatment time (min)±SD | 138±31 | 134±29 | 0.29 |
| Glucose (mmol/l)±SD | 7.7±3.1 | 7.9±2.5 | 0.59 |
| Blood nitrogen urea (mmol/l)±SD | 6.9±2.7 | 6.6±2 | 0.35 |
| Creatinine baseline above upper normal limit, n(%) | 103±22 (48 to 185) | 103±23 (67 to 194) | 0.86 |
| Creatinine baseline above upper normal limit, n (%) | 38 (24) | 17 (22) | 0.85 |
| C reactive protein (mg/l)±SD | 9±21 | 15±35 | 0.15 |
| Haemoglobin (g/dl)±SD | 14±1.7 | 14±1.4 | 0.79 |
| Platelets (10E9/l)±SD | 215±65 | 201±54 | 0.10 |
| Activated partial thromboplastin time (s)±SD | 26±9 | 28±4 | 0.06 |
| Fibrinogen (g/l)±SD | 3.8±0.9 | 3.9±0.9 | 0.36 |
| International normalised ratio±SD | 1.0±0.1 | 1.0±0.1 | 0.14 |
| National Institutes of Health Stroke Scale baseline, median (IQR) | 14 (10 to 19) | 14 (9.5 to 17) | 0.35 |
| Contrast dose (ml)±SD | 139±46 | NA | NA |