Table 1.
Patient characteristics.
| Patient characteristics | Proportion % |
|---|---|
| Age ≥ 65 years | 13.70 |
| Female | 58.77 |
| Race/ethnicity | |
| Non-Hispanic white | 61.21 |
| Non-Hispanic black | 21.04 |
| Hispanic | 15.24 |
| Other races | 2.50 |
| MSA | 84.03 |
| Region | |
| Northeast | 16.98 |
| Midwest | 24.84 |
| South | 35.70 |
| West | 22.49 |
| Comorbidities | |
| Diabetes | 12.12 |
| Asthma | 10.13 |
| COPD | 5.05 |
| CAD | 5.97 |
| Depression | 10.17 |
| Hyperlipidemia | 9.15 |
| Hypertension | 27.07 |
| Substance abuse | 7.48 |
MSA, metropolitan statistical area; COPD, chronic obstructive pulmonary disease; CAD, coronary artery disease.