Baseline characteristics for matched cohorts
| Identifiable linkage (n=166) | Non-identifiable linkage (n=169) | |
| Female gender | 52 (31.3%) | 50 (26.6%) |
| Median age, years (Q1:Q3) | 78.5 (69:85) | 78 (68:85) |
| Diabetes | 30 (18.1%) | 34 (20.1%) |
| Critical pre-op status | 3 (1.8%) | 4 (2.4%) |
| Functional/ischaemic aetiology | 100 (61.7%) | 103 (60.9%) |
| Urgent/emergency procedure | 20 (12.0%) | 19 (11.2%) |
*Note that diabetes status which included any of the following was converted to presence of diabetes: diabetes (dietary control), diabetes (oral medicine), diabetes (insulin), newly diagnosed diabetes.