Patient and hospital demographics
| Clipping | Coiling | |
|---|---|---|
| Patient | ||
| Number of patients | 1022 | 3950 |
| Age, y, median (interquartile range) | 53 (45–61) | 55 (46–65) |
| Female sex, n (%) | 667 (65%) | 2800 (71%) |
| Hospital | ||
| Region, n (%) | ||
| Midwest | 156 (15%) | 447 (11%) |
| South | 436 (43%) | 1666 (42%) |
| Northeast | 273 (27%) | 1290 (33%) |
| West | 157 (15%) | 547 (14%) |
| Median number of beds (range) | 623 (447–725) | 623 (442–683) |
| Urban location, n (versus rural) | 1011 (99%) | 3857 (98%) |
| Teaching, n (versus nonteaching) | 699 (68%) | 2684 (68%) |