Life years saved at age 20 and zero crossing ages for surgical clipping of incidental anterior aneurysms (with 95% confidence limits)
| Aneurysm size | Life years saved at age 20 | Age of zero crossing |
|---|---|---|
| <7 mm | −1.3 (−1.9 to 7.7) | − (− to 54) |
| 7–12 mm | 5.6 (−0.5 to 12.4) | 54 (− to 62) |
| 13–24 mm | 25.7 (10.6 to 40) | 64 (49 to 73) |
| >24 mm | 38.8 (24 to 43) | 68 (53 to 74) |