Table 4.
Validation statistics for the risk-prediction algorithm in the validation cohort
| Statistic | Mean (95% CI) |
|---|---|
| Females | |
| R2 statistica (%) | 64.8 (63.2 to 66.3) |
| D statisticb | 2.78 (2.68 to 2.87) |
| ROC statisticc | 0.89 (0.88 to 0.90) |
| Males | |
| R2 statistica (%) | 66.7 (65.3 to 68.0) |
| D statisticb | 2.90 (2.81 to 2.98) |
| ROC statisticc | 0.906 (0.899 to 0.913) |
a
R2 statistic shows explained variation in time to diagnosis of colorectal cancer – higher values indicate more variation is explained.
b
D statistic is a measure of discrimination – higher values indicate better discrimination.
c
ROC statistic is a measure of discrimination – higher values indicate better discrimination.