Table 1.
Classification of major surgical operations in study and those occurring before the last cognitive assessment in each participant. Values are numbers (percentages)
| Major surgery | Whole study* (n=4525 admissions) | Cognitive follow-up (n=2932 admissions) |
|---|---|---|
| Cardiac: | ||
| Overall | 219 (4.8) | 153 (5.2) |
| Valve | 61 (1.3) | 37 (1.3) |
| Other | 158 (3.5) | 116 (4.0) |
| Thoracic: overall | 182 (4.0) | 85 (2.9) |
| Vascular: | ||
| Overall | 139 (3.1) | 84 (2.9) |
| Intervention | 48 (1.1) | 28 (1.0) |
| Other | 91 (2.0) | 56 (1.9) |
| Intracranial neurosurgery: overall | 89 (2.0) | 38 (1.3) |
| Major non-intracranial/non-cardiothoracic/non-vascular: | ||
| Overall | 3896 (86.1) | 2572 (87.7) |
| General | 1267 (28.0) | 766 (26.1) |
| Orthopedic | 1325 (29.3) | 971 (33.1) |
| Other | 1304 (28.8) | 835 (28.5) |
*
Includes all surgical operations that occurred between baseline (1997-99) and March 2017, including those after the latest available cognitive assessment.