In this research, based on the results of previous studies and according to the opinion of the esteemed consultant of statistics and methodology, the number of samples will be 82 people, and random block method will be used for randomization, and people will be randomly divided into two groups (intervention group) and (group control) are placed and blocks of 4 are used.
In this way, a card will be awarded to each person who has the conditions to enter the study ̨ in chronological order upon entering the study.
Then, by merging the cards together (hitting the cards), one card is removed and its assignment is recorded and a number is assigned to it. And after that card is taken out, it is returned to the pool of other cards.
After assigning numbers to each card in the order of choosing the cards, each person and number will be placed in groups A and B respectively. In this way, the first person is placed in group A - the second person is placed in group B - the third person is placed in group A and .... and this process continues until 82 patients are included in a random list of people.
In order to block the samples under the supervision of a statistical consultant and based on the random sequence of the cards and according to the number of permutations of 4 ̨ random selection process by placing these permutations (6 cards) ̨ in the form of cards (AABB), (ABAB), (BABA), (BBAA), (ABBA) and (BAAB)) are considered.
In this way, by merging the cards together again (hitting the cards), a card is removed every time until a group of 4 cards is created, which must include two A cards and two B cards.
Then each card after being removed is returned to the pool of other cards.
Finally, each block is placed in the intervention group and the control group in the chronological order created. Block 1 is the intervention group, Block 2 is the control group, and Block 3 is the intervention group, and this process will continue until 82 patients are allocated treatment.
In this way, the samples eligible to enter the study were selected and randomly placed in two intervention groups (41 people) and control (41 people).