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Incidence of adverse events.
| Overall | Cranial | Spinal | |
|---|---|---|---|
| Number of patients | 4176 | 2258 | 1918 |
| Case Mix Index | 3.16 | 3.32 | 2.97 |
| Cases with AE (% of patients) | 1043 (25.0) | 540 (23.9) | 503 (26.2) |
| Total number of AEs | 1611 | 895 | 716 |
| Mean number of AEs/case (range) | 1.5 (1–7) | 1.7 (1–7) | 1.4 (1–6) |
| Cases with multiple AEs (% of cases with AE) | 361 (34.6) | 215 (39.8) | 146 (29.0) |
Abbreviation: AE, Adverse Event.
