BMC Health Services Research

Table 1 General characteristics of study subjects

From: Travel distances, socioeconomic characteristics, and health disparities in nonurgent and frequent use of Hospital Emergency Departments in South Carolina: a population-based observational study

Variables	Mean	Std. Dev.	Min	Max
	6,592,501
Age
0 – 1	0.054
1 – 17	0.179
18 – 34	0.307
35 – 65	0.358
>65	0.102
Gender
Female	0.572
Race/Ethnicity
White	0.536
African American	0.419
Hispanic	0.023
Asian	0.003
Native American	0.002
Other	0.017
Payer type
Self-pay	0.269
Medicare	0.147
Medicaid	0.232
Commercial insurance	0.271
HMO	0.034
Others	0.047
Day of the week
Monday	0.151
Tuesday	0.152
Wednesday	0.144
Thursday	0.140
Friday	0.136
Saturday	0.134
Sunday	0.143
Distances
Distance to hospital	11.685	17.155	0	579
Distance to FQHC	10.610	10.083	0	60
NYU ED Scores
Nonemergent	0.252	0.336	0	1
Primary Care Treatable	0.258	0.283	0	1
Primary Care Preventable	0.070	0.184	0	1
Emergent	0.127	0.231	0	1

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