Table 1 Characteristics for knee arthroplasty patients
|  | Knees (n = 917) |
|---|---|
Age in years, median (IQR) | 73 (65–80) |
Gender, n (%) | Â |
 Male  Female | 304 (33) 613 (67) |
Weight in kg, median (IQR) | 88.9 (75.1–100) |
BMI in kg/m2, median (IQR) | 32 (28–36) |
Type of surgery, n (%) | Â |
 Primary  Revision | 909 (99) 8 (1) |
Operative side, n (%) | Â |
 Left  Right | 403 (44) 514 (56) |