| Training cohort | Validation cohort | ||
---|---|---|---|---|
Harrell’s C (95% CI) | Somer’s D (95% CI) | Harrell’s C (95% CI) | Somer’s D (95% CI) | |
5–8 model | 0.79 (0.73–0.86) | 0.59 (0.40–0.72) | 0.74 (0.66–0.82) | 0.49 (0.32–0.74) |
Milan | 0.72 (0.67–0.76) | 0.43 (0.35–0.58) | 0.65 (0.59–0.71) | 0.30 (0.17–0.45) |
Hangzhou | 0.72 (0.65–0.78) | 0.43 (0.31–0.61) | 0.61 (0.54–0.69) | 0.23 (0.07–0.40) |
AFP model | 0.72 (0.66–0.77) | 0.43 (0.33–0.60) | 0.68 (0.60–0.75) | 0.35 (0.20–0.53) |