Prevalence (95% CIa) of ASD per 1,000 8-Year-Olds and Ratios of ASD Prevalence by SESb, Stratified by Race/Ethnicityc.

aCI = confidence interval.bSocioeconomic Status (SES) is indicated by the percentage of families with incomes above the federal poverty level who had children in the census block group of the index child, divided into population SES tertiles.cThe following differences in prevalence between ethnic group were statistically significant at pOverall: Non-Hispanic White versus Non-Hispanic Black; Non-Hispanic White versus Hispanic; Non-Hispanic Black versus Asian; and Hispanic versus Asian. In addition, the overall prevalence of ASD differs at pLow SES: Non-Hispanic White versus Non-Hispanic Black; Non-Hispanic White versus Hispanic; and Non_Hispanic White versus Asian. In addition, within the low SES stratum, the prevalence of ASD differs at pMedium SES: Non-Hispanic Black versus Hispanic.High SES: Non-Hispanic White versus Non-Hispanic Black; Non-Hispanic White versus Asian; and Hispanic versus Asian. In addition, within the high SES stratum, the prevalence of ASD differs at pa. aCI即置信区间（confidence interval，CI）。 b. 社会经济地位（Socioeconomic Status，SES）以索引儿童所在人口普查街区组中，家庭收入高于联邦贫困线且育有子女的家庭占比作为衡量指标，并将该人群划分为社会经济地位三分位层级。 c. 以下族群间的患病率差异具有统计学显著性：非西班牙裔白人与非西班牙裔黑人、非西班牙裔白人与西班牙裔、非西班牙裔黑人与亚裔，以及西班牙裔与亚裔。此外，总体人群中孤独症谱系障碍（Autism Spectrum Disorder，ASD）的患病率差异在低社会经济地位层表现为：非西班牙裔白人与非西班牙裔黑人、非西班牙裔白人与西班牙裔、非西班牙裔白人与亚裔之间；且在低社会经济地位层内，孤独症谱系障碍患病率差异在中等社会经济地位层表现为：非西班牙裔黑人与西班牙裔之间。在高社会经济地位层，存在显著差异的族群对为：非西班牙裔白人与非西班牙裔黑人、非西班牙裔白人与亚裔，以及西班牙裔与亚裔；此外，在高社会经济地位层内，孤独症谱系障碍患病率差异的显著性标注为p[原文此处未完整给出]。