Block Randomization in Clinical Trials: Video Tutorial in Microsoft Excel

hello everyone today I will show you how to do block randomization in clinical trials in my example I have taken 60 volunteers so in the block randomization I have done I have taken group of 4 volunteers and 6 blocks but I will show you how to do it in group of 2 so I have taken 60 volunteers out here and I will divide these 60 volunteers in groups I am taking two volunteers in each group so volunteers and true will be in Group one volunteer 3 and 4 will be in group 2 volunteer 5 and 6 will be in group 3 and so forth so as there are 60 volunteers out here the total number of groups will be 30 now I will write all these groups out here Group one to group 30 so I've got 30 groups out here and I will divide them in blocks the possible number of blocks could be 2 like in this I have taken group of 4 so for number of possibilities are 6 so a could be – drug and be equal to be the possible or a could be the placebo and be equal to be the tester so out here I will take plus a ball touched that is the 1 block another block could be touched and possible so similar way what I will do I will put test and plus about here so first 15 groups will be placebo and touched and next 15 groups will be touched and possible now I will put a random code out here and I will insert a function out here type random fresco and you will get this random function IND insert it out here press ok now Excel has inserted a random number out here I will insert it in all the 30 groups now I will select both these columns I will filter it now what I will do I will sort this column the random numbers from smallest to largest and as you will see I am sorting it – sorry – smallest to largest even the blocks will get sorted see I will show it again fresh 15 groups are placebo untouched next are testing possible and ice I am arranging this smallest to largest it is getting a randomized see now group one is stretched and placebo group two stretched placebo and group 6 is plus supporters group 7 is philosopher touched so no matter how many patients you are taking like for example if you are ending our study with 10 volunteers only so that is group 5 up to group 5 the number of tests and placebo will remain the same that is 5 5 tests and 5 placebo groups so according to this volunteer one will be touched volunteer 2 will be possible for until 3 you will get – drug 24 will get possible now I will come to 4 until 11 we will get possible well in that weather will get touched 113 will get possible volunteer 14 will get touched and so forth so now all the volunteers are randomized in either – group or placebo group by block randomization block randomization is done out here with groups of 2 that is by two possible blocks out here I had done the block randomization by group of 4 see there are 60 volunteers so the total number of groups are 15 is taken for volunteers in each group so total number of possible blocks her six is there the possible number of blocks which I have got by doing three factorial that is 3 into 2 into 1 so 6 possible number of blocks which every period out here as well I win sir today random function sorted it smallest to largest and the group's got randomized as you can see out there the volunteer number 1 we get a volunteer number two will get b-12 number three will get B volunteer number four will also get a so it is randomized


  1. Check out our video on Medscape Drug Interaction Checker tool and its comparison with Drugs. com tool

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