Table 4.

Demographic characteristics of zero versus some proportion population counties (Exposure 2) and tests of difference^a for the U.S. as a whole and the southern, northeastern and western regions of analysis.^a,b

	All counties				South				Northeast				West
	Zero proportion	Some proportion			Zero proportion	Some proportion			Zero proportion	Some proportion			Zero proportion	Some proportion
	Mean	Mean	SE	p	Mean	Mean	SE	p	Mean	Mean	SE	p	Mean	Mean	SE	p
n	322	767			111	422			41	75			136	272
Total population	81,844	91,149	26,450	0.73	62,858	50,361	10,029	0.21	77,394	53,312	19,358	0.22	108,000	165,000	66,769	0.40
2010 population in 2018 county boundary	77,216	87,160	25,164	0.69	58,956	48,656	8881	0.25	76,494	53,022	18,795	0.21	99,341	156,000	63,649	0.37
Age < 18, %	21.8	21.7	0.3	0.67	21.4	21.5	0.3	0.71	20.4	19.2	0.6	0.06	22.8	22.7	0.5	0.84
Age 65 and up, %	18.5	19.1	0.3	0.06	18.3	18.7	0.4	0.31	20.4	21.4	0.9	0.25	18.2	19.1	0.6	0.14
African American, %	5.0	8.4	0.9	0.00	12.2	14.3	1.9	0.27	2.3	2.6	0.8	0.69	1.1	0.9	0.1	0.18
American Indian, %	2.9	2.4	0.6	0.36	0.5	0.9	0.3	0.32	3.5	2.2	1.6	0.41	5.4	4.9	1.3	0.71
Hispanic, %	17.2	8.8	1.3	0.00	3.7	4.7	0.5	0.07	2.9	3.1	0.6	0.80	14.1	16.6	1.7	0.14
White (non-Hispanic), %	71.6	77.3	1.5	0.00	81.0	77.6	1.9	0.07	88.4	89.0	2.1	0.77	74.6	73.9	2.1	0.76
Median household income	47,569	47,689	868	0.89	42,855	43,523	1010	0.51	51,655	51,543	1793	0.95	56,303	53,139	1421	0.03
Poverty, %	18.9	17.2	0.5	0.00	19.9	19.2	0.7	0.29	13.7	13.6	0.8	0.86	13.8	15.1	0.7	0.04
Households w/ public assistance, %	17.6	14.8	0.5	0.00	18.4	16.8	0.7	0.02	14.0	13.5	0.8	0.54	12.4	12.0	0.7	0.64
Unemployment, %	7.0	6.4	0.2	0.01	6.9	6.9	0.3	0.97	5.5	5.8	0.4	0.50	5.4	5.8	0.3	0.28
No high school diploma, %	14.0	14.0	0.4	0.98	16.9	16.9	0.6	0.98	9.1	9.2	0.5	0.84	10.8	10.9	0.6	0.99
Renter occupied units, %	29.4	28.1	0.5	0.01	29.8	27.8	0.8	0.02	23.8	23.8	1.2	1.00	31.4	29.8	0.8	0.04
Vacant housing units, %	21.6	22.8	0.8	0.18	18.7	20.4	0.9	0.06	28.3	32.1	3.1	0.22	21.6	23.9	1.6	0.15
Mobile home housing units, %	12.5	16.8	0.6	0.00	16.8	20.2	1.0	0.00	7.9	9.0	0.9	0.23	13.2	13.7	0.9	0.53
Group quarters pop, %	3.3	3.6	0.3	0.41	4.5	3.9	0.5	0.27	2.7	4.3	1.1	0.14	3.1	2.8	0.4	0.46
Urban vs rural	5.2	5.4	0.2	0.19	5.3	5.1	0.3	0.51	5.6	6.1	0.5	0.27	5.8	5.7	0.3	0.68

^aStandard error (SE); p-value (p).

^bExposure 2: Proportion of total county population exposed to 1+ burns.