Studies of patients with symptomatic carotid stenosis of less than or equal to 50%
| Study | Patients undergoing CEA (n) | Age, mean±SD | % male | Degree of stenosis, mean±SD | Patients with recurrent events prior to CEA, n (%) | Preoperative imaging studies used | Patients with major perioperative complications, n (%)* | Patients with available follow-up, n (% who underwent CEA) | Follow-up in months, mean±SD | Patients with recurrent ischaemic events (n) | Patients with restenosis, n (%) |
| Yoshida et al 17 | 7 | 74.2±5.6 | 85.7 | 27.1±9.9 | 7 (100) | DSA, CTA, MRA | 0 (0.0) | 7 (100) | 19.1±14.6 | 0 | NR |
| Ballotta et al 18 | 57 | 74.6±2.8 | 66.7 | NR | 21 (36.8) | US | 0 (0.0) | 55 (96.5) | 32.0±5.0 | 0 | 1 (1.8) |
| Yoshida et al 19 | 17 | 72.9±4.9 | 94.1 | 31.6±9.8 | NR | DSA, CTA | 0 (0.0) | 14 (82.4) | 71.0±35.4 | 0 | 0 |
| Takai et al 20 | 14 | 68.3 ± 7.7 | 100 | 27.2±10.7 | NR | DSA | NR | 14 (100) | 38.2±15.9 | 0 | 0 |
| Kashiwazaki et al 21 | 16 | 72.8±6.3 | 100 | 37.2±10.6 | NR | CTA | 2 (11.8)† | 16 (100) | 38.5±13.3 | 0 | 0 |
| Nardi et al 22 | 32 | 69.6±8.0 | 75.0 | 28.3±12.6 | 23 (74.1) | CTA, MRA | 0 (0.0) | 32 (100) | 27.3±27.7 | 0 | 0 |
*Defined as MRI findings of ischaemic stroke or permanent neurological deficit.
†Ischaemic changes were within the hemisphere contralateral to endarterectomy in both patients.
CEA, carotid endarterectomy; CTA, CT angiography; DSA, digital subtraction angiography; MRA, magnetic resonance angiography; NR, not reported; US, ultrasound.