Terma | Definition |
---|---|
Case Report Form due date | Date of the event that a form is linked to. For example, for a 6-month post-randomisation follow-up visit, a follow-up form due date would be the date of randomisation plus 6 months |
Tolerance period | Short period after the due date (e.g. 14 or 28 days) for the participating centre to complete and return the relevant Case Report Forms. Forms are not considered overdue until this period has passed |
Scheduled | Form due date is in the future |
Expected | Form due date has passed, but the tolerance period has not. For the purposes of calculating the data return rate, these are counted as not due yet (the same as Scheduled forms) |
Received | Form has been received and entered into the trial database system |
Overdue | The tolerance period has passed, but the form has not yet been received at the clinical trials unit |
Unobtainable | Participating centre has confirmed that data are not available and no form will be sentb |
Data return rate (overall) | \( \frac{Received}{Received+ Overdue+ Unobtainable} \) |
Date return rate (excluding unobtainable forms)c | \( \frac{Received}{Received+ Overdue} \) |