We’re going to show you how to set up a simple randomisation system using the randomisation list option. This will allow us to name our treatment groups and stratify the randomisation using random permuted blocks.
For our trial to compare embryo transfer methods in IVF we want randomisation:
Create a randomisation list using the tool on our website. Enter the following information:
Delayed frozen transfer, Fresh transfer
480(120 women ⨉ 4 strata)
Age group: ≤37, 38+
Number of previous IVF cycles: 0-2, 3 or more
Click the Create list button and check the list appears as expected. All four combinations of the stratification variables should be represented. When you are happy with the list click the Download as CSV button. This is your randomisation list.
You must keep your randomisation list away from anyone who will be randomising patients in practice! This is to maintain allocation concealment
That’s it - your randomisation system is ready! Try it out by filling in the randomisation form. You should receive treatment allocations in the same order as your list from the rows matching the stratification values you enter.
We recommend you set up a dummy system first to test. When you are ready to start your trial create a new list with a different seed.