Difference between the forecasting and the prediction dataset?

[Emimal Jabason]

Can anyone help me to understand the difference between the forecasting and the prediction dataset?

[Razvan Marinescu]

I agree the terms can be confusing. Perhaps the easiest is ignore those terms and to think in terms of D1, D2 and D3. These are defined as follows:
D1 - dataset for training (all data from subjects with at least two timepoints)
D2 - subjects for which you need to provide forecasts (all available data)
D3 - subjects for which you need to provide forecasts (same subjects as D2 but only one visit and only MRI+cognition) - this mimics a clinical trial where only limited cross-sectional data is available

I hope this helps, but let us know if you need further clarifications.

Raz

[Emimal Jabason]

Thank You so much Raz!