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Table 1 The number of units, total allocation permutations and size of random component that the final design is selected from, partitioned into first and additional blocks

From: Balance algorithm for cluster randomized trials

Units Allocations Random element for first block Random element for additional blocks
   Number Percent Number Percent
6 20 - - 7 35%
7 35 - - 10 29%
8 70 10 29% 18 26%
9 126 18 29% 32 25%
10 252 32 25% 63 25%
11 462 58 25% 100 22%
12 924 100 22% 100 11%
13 1,716 100 12% 100 6%
14 3,432 100 6% 100 3%
15 6,435 100 3% 100 2%
16 12,870 100 2% 100 1%
17 24,310 100 1% 1,000 4%
18 48,620 1,000 4% 1,000 2%
19 92,378 1,000 2% 1,000 1%
20 184,756 1,000 1% 1,000 1%
21 352,716 1,000 1% 1,000 0%
22 705,432 1,000 0% 1,000 0%
23 1,352,078 1,000 0% 1,000 0%
24 2,704,156 1,000 0% 1,000 0%
25 5,200,300 1,000 0% 1,000 0%
26 10,400,600 1,000 0% 1,000 0%
27 20,058,300 1,000 0% 1,000 0%
28 40,116,600 1,000 0% 1,000 0%
29 77,558,760 1,000 0% 1,000 0%
30 155,117,520 1,000 0% 1,000 0%
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