Table 2.

t-Tests^a of Equal Means of County Descriptive Variables Over Two Groups of Counties that Reflect Different Area Types As Regards Hot Spots for Late-Stage Breast Cancer

	Group 1: Never a hot spot (N = 1,800)		Group 2: Always a hot spot (N = 269)
	Mean	SD	mean	SD	t-test
County descriptive variables
Proportion American Indian	0.007	0.034	0.034	0.101	−4.429
Proportion Asian	0.008	0.020	0.003	0.007	7.031
Proportion non-Hispanic Black American	0.072	0.120	0.087	0.126	−1.851
Proportion Hispanic	0.033	0.084	0.104	0.197	−5.858
Proportion other	0.006	0.013	0.002	0.006	8.741
Proportion non-Hispanic White	0.875	0.150	0.769	0.204	8.182
Diversity index	0.121	0.077	0.106	0.096	2.376
% Graduate/professional	21.437	9.576	16.453	6.468	10.969
% No high school or equivalent	14.202	5.958	20.677	8.175	−12.503
GINI index of income disparity	0.436	0.033	0.457	0.038	−8.805
Isolation index American Indian	0.031	0.096	0.052	0.153	−2.141
Isolation index Asian	0.029	0.045	0.013	0.016	11.183
Isolation index Black	0.135	0.168	0.223	0.243	−5.746
Isolation index Hispanic	0.107	0.131	0.178	0.246	−4.654
Isolation index Pacific Islander	0.005	0.009	0.003	0.007	4.374
Isolation index non-Hispanic White	0.831	0.149	0.666	0.222	11.842
Proportion poor or no English language	0.013	0.036	0.062	0.142	−5.642
% Uninsured aged 40–64	16.348	5.163	22.084	5.256	−16.8732
% Uninsured	17.702	5.217	23.077	4.871	−16.722
% Unemployed	9.441	2.981	9.570	3.274	−0.606
Mammography facilities per 1,000	0.146	0.147	0.114	0.189	2.667
proportion managed care penetration	0.182	0.120	0.113	0.075	12.819
Proportion persistent poverty	0.062	0.242	0.424	0.495	−11.771
% Poor Black rural	1.471	3.297	5.353	7.831	−8.024
% Poor Black urban	0.676	1.833	1.157	3.414	−2.216
% Poor Hispanic rural	1.097	2.231	3.366	6.504	−5.671
% Poor Hispanic urban	0.561	1.413	1.021	3.534	−2.110
% Poor non-Hispanic White rural	7.934	5.363	8.017	6.238	0.205
% Poor non-Hispanic White urban	1.690	2.601	0.657	1.507	9.357
Proportion population in poverty	0.150	0.058	0.210	0.082	−11.633
Proportion vacant housing	0.227	0.257	0.263	0.224	−2.404
Proportion heat with wood fire	0.058	0.071	0.038	0.064	4.608
Proportion living crowded quarters	0.005	0.007	0.008	0.010	−4.653
Proportion no plumbing	0.007	0.007	0.010	0.014	−3.004
County typology codes
Proportion emphasis farming	0.102	0.303	0.186	0.390	−3.371
Proportion emphasis low Education	0.109	0.312	0.383	0.487	−8.939
Proportion emphasis Manufacturing	0.169	0.375	0.108	0.311	2.922
Proportion emphasis mining	0.047	0.212	0.130	0.337	−3.919
Proportion emphasis population loss	0.121	0.326	0.234	0.424	−4.190

^aAll two-sided t-test statistics are significant at p < 0.01, unless bolded values.

SD, standard deviation.