TABLE 2.
Summary of Datasets for Model Training, Validation, and Independent Testing
| Set | Start | End | Source | n | Purpose |
|---|---|---|---|---|---|
| Training by cross-validation | |||||
| Training folds (80%) | 2014 January | 2019 June | Internal | 668 | Train model |
| Validation fold (20%) | 2014 January | 2019 June | Internal | 167 | Validate model |
| Test | |||||
| 1 | 2014 January | 2019 June | Internal | 196 | Compare models performance |
| 2 | 2019 July | 2019 December | Internal | 64 | Compare models with experts’ IOV |
| 3 | 2018 January | 2019 December | External | 125 | Compare internal with external model performance |