Table 1. Patient characteristics.
| Variable | N of complete data |
Mean (Standard deviation) [Interquartile range]
or Percentage |
| Age, years | 8346 | 62.6 (14.7) [52.0-74.0] |
| Male | 8346 | 51.5% |
| Height, cm | 6876 | 168.6 (10.2) [160.0-176.0] |
| Weight, kg | 7197 | 78.8 (17.7) [66.0-89.1] |
| Serum creatinine, mmol/L | 4002 | 87.5 (39.0) [69.0-96.0] |
| Current smoker | 8217 | 18.3% |
| Hypertension | 6663 | 66.2% |
| Diabetes (type 2) | 7971 | 16.4% |
| Myocardial infarction | 6541 | 11.2% |
| Vascular surgery | 6566 | 9.6% |
| Stroke | 6855 | 14.4% |
| Transient ischemic attack | 6751 | 12.3% |
| Chronic kidney disease* | 4002 | 22.5% |
| Birth month - | 8346 | |
| 1 | 8.4% | |
| 2 | 8.1% | |
| 3 | 8.8% | |
| 4 | 8.5% | |
| 5 | 8.6% | |
| 6 | 8.9% | |
| 7 | 8.9% | |
| 8 | 8.2% | |
| 9 | 8.2% | |
| 10 | 8.0% | |
| 11 | 8.2% | |
| 12 | 7.5% |
*The CKD-EPI formula was used to estimate glomerular filtration rate; the threshold used to define chronic kidney disease is an eGFR<60 mL/min/1.73 m2.