Table 1 Demographic characteristics of training and testing cohorts
Characteristics | Training cohort (n = 3259) | Testing cohort (n = 815) | Total (n = 4074) |
|---|---|---|---|
Age (year), mean ± SD | 52.10 ± 14.33 | 52.02 ± 14.41 | 52.08 ± 14.35 |
Gender (male/female) | 1009 / 2250 | 259 / 556 | 1268 / 2806 |
Number of X-ray images | 4247 | 1070 | 5317 |
KL grades | Â | Â | Â |
0 | 274 | 66 | 340 |
1 | 1214 | 275 | 1489 |
2 | 1686 | 451 | 2137 |
3 | 714 | 172 | 886 |
4 | 359 | 106 | 465 |