Between subjects designs include completely randomized designs, where subjects are assigned completely at random to treatments, and matched designs or block designs, where subjects are divided into groups (blocks) of like subjects and random assignment is done within each block separately.
Research Pharmaceutical Services prepared a randomization list with balanced blocks of 6 subjects each, different blocks were used for subjects with or without pretreatment yielding a respective balance (stratification).
It was created in blocks of 10 subjects at a time, and study coordinators assigned participants to an intervention arm in sequential fashion.
Within each of these eight categories, patients were randomly allocated in equal proportions to one of the three study arms, in randomly permuted blocks of nine subjects.
Based on the results of the interim analysis, the study was stopped early, after including five blocks of six subjects each, because we considered the clinical response rate of intervention 2 to be significantly lower than that of intervention 1, after follow-up.
Subjects enrolled by the clinical investigator were randomized by the statistician per antigen dose, by blocks of 12 subjects, 6 (3 males, 3 females) to each adjuvant cohort.
The randomization was carried out on the two conditions (computer/paper and pencil) and 'degree of case difficulty' (easy/difficult) and was applied to the starting combinations in blocks of four subjects.
Their opulent houses, on the beach in Gaza, in the hills of the West Bank, mock the crumbling apartment blocks of their subjects.
This included computerized generation of the allocation schedule in blocks of 6 subjects and blinded disbursement of treatment in numbered containers.
The order of testing was randomized in blocks of 10 subjects stratified by diagnosis.
