In this study the restricted Randomization method of block randomization is used. Blocking is used to balance the number of samples assigned to each of the study groups.
Randomization method was performed using balanced block randomization and in the form of 4 blocks using computer. Each drug is labeled with a number from 1 to 64. Patients were divided into two groups for the trial: the first group (32 people) intervention group or drug group and the second control group (32 people) placebo group. Both groups were equally divided in terms of characteristics and coordinated conditions. The control group is assigned to "A" and the intervention group to "B", and then these two groups are divided into 6 blocks of 4: (1) AABB, (2) BBAA, (3) ABAB, (4) BABA, (5) AB BA, (6) BAAB .These blocks are randomly stacked together by a computer to form a chain of random groups (e.g. B B A A A A B B A B A B B A B A A B B A B A A B ) Patients then enter these groups in the order of enrollment.
For randomization, a randomization tool for random sequence software called Random allocation software is used. In addition to simple randomization, this software is also able to generate random sequences by block generation method. For concealment, we use allocation concealment, which is the method used to execute a random sequence on the study participants, so that the assigned group is not known before the individual is assigned. Drugs containing Chicory and Fumitory product or placebo were produced in the same shape and color and after coding were placed in sealed envelopes. Using opaque envelopes sealed with random sequences (Sequentially numbered, sealed, opaque envelopes) in which in this method each random sequence is recorded on a card and the cards are in the envelopes respectively. Are placed. In order to maintain a random sequence, the envelopes are numbered in the same way on the outer surface. Finally, the lids of the letter envelopes are glued and placed inside a box, respectively. At the beginning of the registration of participants, based on the order of entry of eligible participants into the study, one of the envelopes of the letter is opened in order and the assigned group of the participant is revealed.