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Number needed to treat (NNT) with carotid endarterectomy to prevent one ischemic stroke in 5 years based on pooled data from NASCET and ECST
| Subgroup | NNT |
|---|---|
| Men | 9 |
| Women | 36 |
| Age < 65 years old | 18 |
| Age > 75 years old | 5 |
| Time from last event <2 weeks | 5 |
| Time from last event >12 weeks | 125 |
