Abstract：
BACKGROUND: The extent to which incidence rates of asthma-related emergency department (ED) visits vary from neighborhood to neighborhood and predictors of neighborhood-level asthma ED visit burden are not well understood.
OBJECTIVE: We aimed to describe the census tract-level spatial distribution of asthma-related ED visits in Central Texas and identify neighborhood-level characteristics that explain variability in neighborhood-level asthma ED visit rates.
METHODS: Conditional autoregressive models were used to examine the spatial distribution of asthma-related ED visit incidence rates across census tracts in Travis County, Texas, and assess the contribution of census tract characteristics to their distribution.
RESULTS: There were distinct patterns in ED visit incidence rates at the census tract scale. These patterns were largely unexplained by socioeconomic or selected built environment neighborhood characteristics. However, racial and ethnic composition explained 33% of the variability of ED visit incidence rates across census tracts. The census tract predictors of ED visit incidence rates differed by racial and ethnic group.
CONCLUSIONS: Variability in asthma ED visit incidence rates are apparent at smaller spatial scales. Most of the variability in census tract-level asthma ED visit rates in Central Texas is not explained by racial and ethnic composition or other neighborhood characteristics.
OBJECTIVE: We aimed to describe the census tract-level spatial distribution of asthma-related ED visits in Central Texas and identify neighborhood-level characteristics that explain variability in neighborhood-level asthma ED visit rates.
METHODS: Conditional autoregressive models were used to examine the spatial distribution of asthma-related ED visit incidence rates across census tracts in Travis County, Texas, and assess the contribution of census tract characteristics to their distribution.
RESULTS: There were distinct patterns in ED visit incidence rates at the census tract scale. These patterns were largely unexplained by socioeconomic or selected built environment neighborhood characteristics. However, racial and ethnic composition explained 33% of the variability of ED visit incidence rates across census tracts. The census tract predictors of ED visit incidence rates differed by racial and ethnic group.
CONCLUSIONS: Variability in asthma ED visit incidence rates are apparent at smaller spatial scales. Most of the variability in census tract-level asthma ED visit rates in Central Texas is not explained by racial and ethnic composition or other neighborhood characteristics.
摘要：
背景：哮喘相关ED就诊率在不同社区之间的差异程度以及社区级哮喘ED就诊负担的预测因素尚不清楚。
目的：描述德克萨斯州中部与哮喘相关的急诊就诊的人口普查道水平空间分布，并确定解释社区水平哮喘ED就诊率变异性的社区水平特征。
方法：使用条件自回归模型来检查特拉维斯县哮喘相关ED就诊发生率的空间分布，TX人口普查区域，并评估人口普查区域特征对其分布的贡献。
结果：在人口普查范围内，ED就诊发生率有不同的模式，这在很大程度上无法解释社会经济或选定的建筑环境邻里特征。然而,种族和族裔组成解释了人口普查区ED就诊发生率差异的33％。不同种族和族裔的ED就诊率的人口普查区预测指标不同。
结论：在较小的空间尺度上，哮喘ED就诊率的变异性是明显的。德克萨斯州中部人口普查道级别哮喘ED就诊率的大部分变异性不能通过种族和族裔组成或其他邻里特征来解释。
目的：描述德克萨斯州中部与哮喘相关的急诊就诊的人口普查道水平空间分布，并确定解释社区水平哮喘ED就诊率变异性的社区水平特征。
方法：使用条件自回归模型来检查特拉维斯县哮喘相关ED就诊发生率的空间分布，TX人口普查区域，并评估人口普查区域特征对其分布的贡献。
结果：在人口普查范围内，ED就诊发生率有不同的模式，这在很大程度上无法解释社会经济或选定的建筑环境邻里特征。然而,种族和族裔组成解释了人口普查区ED就诊发生率差异的33％。不同种族和族裔的ED就诊率的人口普查区预测指标不同。
结论：在较小的空间尺度上，哮喘ED就诊率的变异性是明显的。德克萨斯州中部人口普查道级别哮喘ED就诊率的大部分变异性不能通过种族和族裔组成或其他邻里特征来解释。
