Table 4.

Results of the univariate regression results estimating the association between each neighborhood factor and neighborhood COVID-19 burden for the Western United States

West
	Nevada	Oregon
	IRR [95% CI]	IRR [95% CI]
Neighborhood characteristic
Neighborhood affluence
Q1 (ref.)	Ref.	Ref.
Q2	1.02 [0.98–1.05]	0.9* [0.83–0.98]
Q3	0.97 [0.9–1.05]	0.83*** [0.77–0.89]
Q4 (highest affluence)	0.91*** [0.88–0.95]	0.73*** [0.65–0.81]
Neighborhood disadvantage
Q1 (ref.)	Ref.	Ref.
Q2	1 [0.94–1.06]	1.12+ [1–1.25]
Q3	1.09*** [1.04–1.15]	1.25*** [1.17–1.34]
Q4 (highest disadvantage)	1.15*** [1.07–1.22]	1.4*** [1.29–1.52]
Neighborhood population density	1 [1–1]	1** [1–1]
Political partisanship  (% of votes cast for Republican candidates in 2018 and the six years before)	0.87*** [0.82–0.91]	1.1*** [1.04–1.16]
Rural-urban commuting area codes
Metropolitan (ref.)	Ref.	Ref.
Micropolitan	0.72*** [0.62–0.83]	1.19** [1.05–1.36]
Small town	0.51*** [0.42–0.62]	1.08 [0.89–1.31]
Rural	0.51** [0.32–0.83]	1.01 [0.84–1.21]

+p < 0.10, *p < 0.05, **p < 0.01, ***p < 0.001.