Table 2.
Spatial Clustering of Supermarkets Within 220 Census Tracts, St Louis, Mo
| Possible Cluster Identifed | Observed No. of Supermarkets | Expected No. of Supermarkets | Ratio of Observed to Expected No. of Supermarkets | Population in Cluster (No. of Census Tracts) | Log Likelihood Ratio (P) |
| All supermarkets (unadjusted) | |||||
| 1 | 41 | 27.8 | 1.5 | 309,874 (77) | 4.55 (.86) |
| All supermarkets (adjusted for racial composition and poverty rate) | |||||
| 1 | 54 | 38.9 | 1.4 | 456,825 (113) | 5.69 (.48) |
| Supermarkets in highest tertilea (unadjusted) | |||||
| 1 | 23 | 9.7 | 2.4 | 335,664 (76) | 14.88 (.001) |
| 2 | 0 | 9.0 | 0.0 | 311,491 (96) | 10.98 (.003) |
| Supermarkets in highest tertilea (adjusted for racial composition and poverty rate) | |||||
| 1 | 9 | 2.3 | 4.0 | 46,531 (10) | 6.80 (.11) |
a
Each restaurant and supermarket was assigned a rating of high, medium, or low potential for meeting dietary intake recommendations as established by the U.S. Department of Agriculture (27).