We have three groups in this study. Group A = training with booklet, Group B = training with booklet and follow-up with SMS, and Group C = Control group.
In this study, we have 111 samples, each of which contains 37 patients. For block randomization, the simplest and smallest production block will be 3 blocks (3 = the number of groups under investigation). Therefore, we have 6 states including 1. ABC, 2. CAB, 3. CAB, 4. BCA, 5. BAC, 6. ABC. To execute, we will use a regular hexagon (6 sided dice) that each side of dice is attributed to one of the 1 to 6 above states. So, by each throwing a dice, one of these situations arises. By 37 throwing the dice, we have 37 triple block that randomly created. Example:
ABC, BAC, BAC, CBA, ABS, CAB, ........ = 37 Triple Block