Risk animation showing risk with and without surgery in symptomatic patients
| Day of TIA | < 1 month | 1 month – 1 Year | 1 – 2 Years | |
|---|---|---|---|---|
| Risk of stroke without CEA | 0 | 5 | 20 | 30 |
| Risk of stroke with CEA | 0 | 5 | 10 | 14 |
| Number prevented in period | 0 | 0 | 10 | 6 |
| Cumulative number prevented | 0 | 0 | 10 | 16 |
Based on the animation above, which of the following statements are correct?
Correct statements
- The risk of stroke in the first month after surgery is 5%
- Surgery is likely to prevent more strokes if performed earlier after a TIA or stroke
- Carotid endarterectomy should be performed within 2 weeks of the last event
- Surgery at least halves the risk of stroke over 2 years
- For every 100 operations about 16 would avoid a stroke in the next two years
Incorrect statements
- An individual has a 1 in 2 chance of benefit from surgery in first 2 years
Page last reviewed: 22 Apr 2022
