Table 1.
Emergency department visit characteristics by presence of a MHD-related code.
| Characteristic | Non-MHD visits | MHD visits | Overall | Standardized difference | |||
|---|---|---|---|---|---|---|---|
| Total visits (N) | 29,090,550 | 3,030,746 | 32,121,296 | ||||
| Mean age (SD) | 37.7 ± 26.22 | 49.8 ± 23.53 | 38.8 ± 26.22 | 0.49* | |||
| N | % | N | % | N | % | ||
| Age group | |||||||
| 0–11 | 4,326,903 | 14.9 | 35,417 | 1.2 | 4,362,320 | 13.6 | −0.52* |
| 12–17 | 1,541,532 | 5.3 | 106,961 | 3.5 | 1,648,493 | 5.1 | −0.09 |
| 18–24 | 3,753,077 | 12.9 | 263,336 | 8.7 | 4,016,413 | 12.5 | −0.14* |
| 25–44 | 8,685,861 | 29.9 | 946,449 | 31.2 | 9,632,310 | 30.0 | 0.03 |
| 45–64 | 6,395,692 | 22.0 | 878,191 | 29.0 | 7,273,883 | 22.6 | 0.16* |
| ≥65 | 4,387,485 | 15.1 | 800,392 | 26.4 | 5,187,877 | 16.2 | 0.28* |
| Female | 16,224,986 | 55.8 | 1,936,472 | 63.9 | 18,161,458 | 56.5 | 0.17* |
| Insurance type | |||||||
| Medicare | 5,048,781 | 17.4 | 1,045,380 | 34.5 | 6,094,161 | 19.0 | 0.40* |
| Medicaid | 6,787,098 | 23.3 | 593,643 | 19.6 | 7,380,741 | 23.0 | −0.09 |
| Private | 6,809,368 | 23.4 | 546,412 | 18.0 | 7,355,780 | 22.9 | −0.13* |
| Self-Pay | 6,829,701 | 23.5 | 527,127 | 17.4 | 7,356,828 | 22.9 | −0.15* |
| Other | 2,624,572 | 9.0 | 240,510 | 7.9 | 2,865,082 | 8.9 | −0.04 |
| Transport mode | |||||||
| Ambulance | 3,516,999 | 12.1 | 813,301 | 26.8 | 4,330,300 | 13.5 | 0.38* |
| Walk-in | 18,966,520 | 65.2 | 1,599,906 | 52.8 | 20,566,426 | 64.0 | −0.25* |
| Other | 1,319,000 | 4.5 | 108,202 | 3.6 | 1,427,202 | 4.4 | −0.05 |
| Injury | |||||||
| Any Injury | 6,117,828 | 21.0 | 562,626 | 18.6 | 6,680,454 | 20.8 | −0.06 |
| Self-Harm | 19,359 | 0.1 | 61,803 | 2.0 | 81,162 | 0.3 | 0.19* |
| Assault | 248,133 | 0.9 | 22,962 | 0.8 | 271,095 | 0.8 | −0.01 |
| ED disposition | |||||||
| Discharged home | 23,113,037 | 79.5 | 1,827,528 | 60.3 | 24,940,565 | 77.6 | −0.43* |
| Admitted | 2,974,231 | 10.2 | 808,761 | 26.7 | 3,782,992 | 11.8 | 0.44* |
| Transferred | 495,369 | 1.7 | 180,177 | 5.9 | 675,546 | 2.1 | 0.22* |
| Eloped | 935,273 | 3.2 | 44,242 | 1.5 | 979,515 | 3.0 | −0.11* |
| Other | 456,092 | 1.6 | 64,711 | 2.1 | 520,803 | 1.6 | 0.037 |
| Substance abuse | 634,391 | 2.2 | 350,192 | 11.6 | 984,583 | 3.1 | 0.38* |
| Annual visit count | |||||||
| 2008 | 3,843,091 | 347,790 | 4,190,881 | N/A | |||
| 2009 | 4,000,311 | 381,700 | 4,382,011 | N/A | |||
| 2010 | 3,996,392 | 409,276 | 4,405,668 | N/A | |||
| 2011 | 4,157,944 | 436,365 | 4,594,309 | N/A | |||
| 2012 | 4,353,369 | 473,823 | 4,827,192 | N/A | |||
| 2013 | 4,340,661 | 481,686 | 4,822,347 | N/A | |||
| 2014 | 4,398,782 | 500,106 | 4,898,888 | N/A | |||
MHD, Mental Health Diagnosis-Related; *Indicates a standardized difference >|0.10|. Categories may not total 100% given missing data or “unknown” fields.