Table 1. Descriptive Characteristics of Study Sample.
| Characteristics | % (SE)a |
|---|---|
| Age, y | |
| 18-30 | 31.6 (0.14) |
| 31-40 | 20.0 (0.02) |
| 41-50 | 20.3 (0.02) |
| 51-64 | 28.1 (0.02) |
| Male | 44.6 (0.03) |
| Race/ethnicity | |
| White | 45.3 (0.03) |
| Black | 12.1 (0.02) |
| Hispanic | 33.1 (0.03) |
| Other | 6.2 (0.01) |
| Unknown | 7.2 (0.01) |
| Insurance status | |
| Privately, always | 46.1 (0.03) |
| Medicare, ever | 7.2 (0.01) |
| Medicaid, ever | 21.9 (0.02) |
| Uninsured, ever | 28.3 (0.02) |
| Urban county of patient residence | 97.1 (0.01) |
| Visit characteristics | |
| Ever admitted inpatient | 4.7 (0.01) |
| Any primary mental health diagnosis | 29.1 (0.02) |
| Non–mental health Clinical Classifications Software codesb | |
| Infectious and parasitic diseases | 11.1 (0.02) |
| Neoplasms | 4.0 (0.01) |
| Endocrine, nutritional, and metabolic diseases and immunity disorders | 25.2 (0.02) |
| Diseases of the blood and blood-forming organs | 6.9 (0.01) |
| Diseases of the nervous system and sense organs | 24.2 (0.02) |
| Diseases of the circulatory system | 29.1 (0.02) |
| Diseases of the respiratory system | 22.5 (0.02) |
| Diseases of the digestive system | 21.8 (0.02) |
| Diseases of the genitourinary system | 18.9 (0.02) |
| Complications of pregnancy, childbirth, and the puerperium | 5.6 (0.01) |
| Diseases of the skin and subcutaneous tissue | 8.2 (0.01) |
| Diseases of the musculoskeletal system and connective tissue | 20.1 (0.02) |
| Congenital anomalies | 0.7 (0.00) |
| Certain conditions originating in the perinatal period | 0.0 (0.00) |
| Injuries and poisoning | 32.1 (0.03) |
| Symptoms, signs, and ill-defined conditions and factors influencing health status | 32.1 (0.03) |
| Residual codes, unclassified, all E codes and V codes | 31.6 (0.03) |
a
Standard error of the mean is expressed in units of percentage points.
b
Diagnoses are grouped according to the Healthcare Cost and Utilization Project’s Clinical Classifications Software and represent any diagnosis recorded in any visit to the emergency department or inpatient hospitalization following an emergency department visit.