Table 2. Categorical information for two grouping variables (i.e. Level-2 variables).
| Category name and criteria | Grouping variables from the second level |
|||
|---|---|---|---|---|
| Community structurea | Network density | |||
| Range | Distributionb | Range | Distributionb | |
| Category A (Min, Min+∂) | 3.20 to 10.16 | 29 (34.12%) | 0.08 to 0.17 | 11 (12.94%) |
| Category B (>Min+∂, Min+2*∂) | >10.16 to 17.12 | 36 (42.35%) | >0.17 to 0.28 | 40 (47.06%) |
| Category C (>Min+2*∂, Min+3*∂) | >17.12 to 24.08 | 12 (14.12%) | >0.28 to 0.39 | 20 (23.53%) |
| Category D (>Min+3*∂, Min+4*∂) | >24.08 to 31.04 | 6 (7.06%) | >0.39 to 0.50 | 11 (12.94%) |
| Category E (>Min+4*∂, Max) | >31.04 to 37.80 | 2 (2.35%) | >0.50 to 0.63 | 3 (3.53%) |
aCaptured by average # of physicians per community.
bIndicates how many of 85 physician collaboration networks belong to this category.