Census Block Characteristics | Odds Ratio (95% CI) |
---|---|

Children/adolescents (<18 years old) | |

Quartile 1 (<17.9%) | 1.64 (1.57–1.71) |

Quartile 2 (≥17.9% and <25.3%) | 1.28 (1.24–1.32) |

Quartile 3 (≥25.3% and <32.5%) | 1.14 (1.12–1.17) |

Quartile 4 (≥32.5%)Reference group | |

Elderly (older than 65 years) | |

Quartile 1 (<5.4%) | 1.23 (1.18–1.28) |

Quartile 2 (≥5.4% and <11.1%) | 1.19 (1.15–1.23) |

Quartile 3 (≥11.1% and <19.0%) | 1.11 (1.09–1.14) |

Quartile 4 (≥19.0%) | Reference group |

Nonwhite^{*} | |

Quartile 1 (0%) | Reference group |

Quartile 2 (≥0% and <10.7%) | 1.28 (1.25–1.32) |

Quartile 3 (≥10.7% and <34.6%) | 1.38 (1.33–1.43) |

Quartile 4 (≥34.6%) | 1.36 (1.28–1.45) |

Hispanic^{*} | |

Group 1 (0%) | Reference group |

Group 2 (≥0% and <12.9%) | 1.30 (1.27–1.33) |

Group 3 (≥12.9%) | 1.45 (1.37–1.52) |

Male | |

Quartile 1 (<44.4%) | Reference group |

Quartile 2 (≥44.4% and <48.6%) | 1.03 (1.01–1.04) |

Quartile 3 (≥48.6% and <52.6%) | 1.03 (1.01–1.04) |

Quartile 4 (≥52.6%) | 1.05 (1.03–1.07) |

Median household income | |

Quartile 1 (<$30, 781) | Reference group |

Quartile 2 (≥$30,781 and <$40,391) | 1.52 (1.36–1.69) |

Quartile 3 (≥$40,391 and <$54,779) | 2.44 (2.20–2.71) |

Quartile 4 (≥$54,779) | 3.63 (3.26–4.05) |

This table focuses only on the urban population and defines retail clinic catchment area based on a 5-minute driving distance.

* We could not define 4 quartiles for these variables because of skew (a large number of census blocks with 0% nonwhite or Hispanic population). For the Hispanic percentage variable we divided the census blocks into 3 groups. For the nonwhite percentage variable we divided the census blocks into 4 groups, but the quartile 1 group had slightly more than a quarter of the census blocks whereas the quartile 2 group had slightly less than a quarter.