In this study, we will use the permutation block randomization method.
In this two-group clinical trial, the size of the blocks will be 4, 6, and 8 (in this method, the number of people assigned to each group in the blocks is equal). The randomization tool is one of the random sequence generation software (software for random allocation) such as Stata or R.
For concealment in the research, we use concealment allocation. By using opaque, sealed, numbered sequentially envelopes, in this method, each random sequence created is recorded on a card, and the cards inside the letter envelopes are They are placed in order. In order to maintain a random sequence, the outer surface of the envelopes is numbered in the same order. Finally, the lid of the letter envelopes is glued and placed in a box. At the time of the registration of the participants, based on the order of entry of the eligible participants into the study, one of the envelopes will be opened and the allocation group of that participant will be revealed.