Table 4 Example of covariate-constrained randomization (adapted from Moulton 2004 )[64]
From: Allocation techniques for balance at baseline in cluster randomized trials: a methodological review
| Â | Baseline performance | ||||
|---|---|---|---|---|---|
Allocation | Intervention | Control | Difference | ||
A | 25 | 50 | 60 | 75 | 30 |
B | 25 | 60 | 50 | 75 | 20 |
C | 25 | 75 | 50 | 60 | 5 |
D | 50 | 60 | 25 | 75 | 5 |
E | 50 | 75 | 25 | 60 | 20 |
F | 60 | 75 | 25 | 50 | 30 |
| Â | Covariate rate | ||||
Allocation | Intervention | Control | Difference | ||
A | 80 | 60 | 75 | 70 | 2.5 |
B | 80 | 75 | 60 | 70 | 12.5 |
C | 80 | 70 | 60 | 75 | 7.5 |
D | 60 | 75 | 80 | 70 | 7.5 |
E | 60 | 70 | 80 | 75 | 12.5 |
F | 75 | 70 | 80 | 60 | 2.5 |