Table 1. Patients’ characteristics before and after gender-bias mitigation by randomised under-sampling.
IQR: interquartile range, OA: osteoarthritis, OKS: Oxford Knee Score, SD: standard deviation.
| Prior to bias mitigation | After bias mitigation | ||
| Gender | Female | 142 | 142 |
| Male | 187 | 144 | |
| Age | Range | 32 - 90 | 32 - 90 |
| Mean (SD) | 66.4 (10.2) | 66.7 (10.1) | |
| BMI | Range | 16 - 42 | 16 - 42 |
| Median (IQR) | 26 (24 - 30) | 26 (24 - 30) | |
| OA grade (Number (%)) | 0 | 1 (0) | 1 (0) |
| 1 | 18 (5) | 15 (5) | |
| 2 | 59 (18) | 54 (19) | |
| 3 | 75 (23) | 66 (23) | |
| 4 | 176 (53) | 152 (52) | |
| Pre-op OKS | Range | 1 - 48 | 1 - 48 |
| Median (IQR) | 32 (26 – 39) | 32 (26 – 38) | |
| Post-op OKS | Range | 5 - 48 | 5 - 48 |
| Median (IQR) | 39 (31 – 45) | 38 (31 – 44) | |
| Response | Range | -17 – 34 | -17 – 34 |
| Median (IQR) | 5 (-1 – 11) | 5 (-1 – 11) |