Table 1.

Characteristics of the Populations Within the 163 Zip Code–Defined Areas in the Chicagoland Region

Total Zip Codes	163
Zip codes without dialysis stations	77
Total residents	5,232,412
Residents within zip code	27,783 [14,220-43,074]
Total dialysis stations	2,501
Dialysis stations within zip codea	24 [16-36]
White race	70.1% [44.9%-84.1%]
Black race	6.9% [3.5%-29.1%]
Hispanic ethnicity	11.9% [6.3%-24.8%]
Asian race	5.0% [1.7%-12.5%]
Age, y	38.7 [34.2-41.5]
Age ≥ 65 y	14.2% [11.4%-17.1%]
Male sex	48.8% [47.3%-50.1%]
Income	$65,262 [$50,521-$88,298]
Families below federal poverty threshold	7.3% [4.3%-13.9%]
Tests within zip code	2,728 [1,398-4,521]
Positive tests	311.5 [159-636]
Positive rate	13% [9%-16%]
Deaths	13 [4-35]

Note: Values for continuous variables are given as median [interquartile range].

^aLimited to the 86 zip codes with at least 1 dialysis station; 77 zip codes had zero dialysis stations.