Table 3 Imbalance score by site characteristic and overall for all 1680 assignments and for the 34 assignments with the lowest overall imbalance scores
From: A method to reduce imbalance for site-level randomized stepped wedge implementation trial designs
Site characteristics (categorical) | Imbalance score (IMB) for all 1680 site assignments Mean (SD) | Imbalance score (IMB) for 34 site assignment with minimal scores Mean (SD) |
|---|---|---|
Psychological safety | 0.40 (0.42) | 0.12 (0.11) |
Number of BHIP teams previously established | 0.38 (0.40) | 0.15 (0.13) |
Number of patients seen in general mental health clinics in the prior year | 0.36 (0.34) | 0.09 (0.07) |
System redesign experience | 0.40 (0.42) | 0.10 (0.07) |
Proportion of care via telephone | 0.38 (0.40) | 0.13 (0.11) |
VA geographic region | 0.40 (0.42) | 0.09 (0.07) |
Urban/Rural/Highly Rural | 0.40 (0.42) | 0.18 (0.15) |
VA facility complexity category | 0.38 (0.40) | 0.13 (0.11) |
Overall imbalance score | 3.10 (0.91) | 0.99 (0.32) |