Table 4. Adjusted polynomial regression analyses: Factors associated with the carceral resource index, United States (n = 50 cities).

Model 1	Coefficient	Standard Error	p-value	Adjusted R2
ICEincome	0.6570	0.3084	0.0386	0.290
(ICEincome)^2	0.3977	0.3112	0.2077
Model 2
ICEeducation	-0.1595	0.5018.	0.7521	0.377
(ICEeducation)^2	0.7066	0.2677	0.0115
Model 3
ICEwb+income	0.4690	0.2903	0.1129	0.298
(ICEwb+income)^2	0.5849	0.2862	0.0468
Model 4
ICEwpc+income	0.3969	0.2987	0.1905	0.261
(ICEwpc+income)^2	0.4536	0.2986	0.1355