“…MATERIALS AND METHODS: Regional average adjusted gross income (AGI) was determined by cross-referencing self-reported residential zip codes with average AGI per zip code supplied by the Internal Revenue Service. Two groups were created: (1) lower-income: individuals from neighborhoods with the lowest 10% of AGI (near the United States poverty line), (2) higher-income: the remaining 90% of individuals. …”
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“…Zip codes were used to determine median annual household income using the 2020 United States Census records and 2019 Internal Revenue Service reports. Logistic regression estimated the association between race, ethnicity, sex, age, and income and presence of an ESBL in the urine. …”
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“…We used the publicly available Internal Revenue Service’s Statistics of Income data to estimate hourly earnings by zip code in order to estimate patient cost savings. …”
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“…Socioeconomic characteristics were determined by linking to ZIP code data from the United States Census Bureau's American Community Survey and the Internal Revenue Service's Statistics of Income Division. Specific variables of interest included mean persons per household, median household income, percent unemployment, and percent with less than high school education. …”
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