Table 1.
California ED visit rates (per 1000 population), 2005–2015
| 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | % Change | P values | |
| Total ED visit rate | 284.3 | 282.4 | 289.0 | 294.4 | 315.3 | 309.8 | 317.3 | 326.0 | 331.1 | 344.9 | 363.5 | 27.8% | <0.001 |
| Age group | |||||||||||||
| <5 | 455.4 | 448.4 | 474.8 | 479.1 | 544.5 | 514.3 | 510.3 | 508.8 | 518.5 | 512.9 | 542.5 | 19.1% | <0.001 |
| 5–19 | 195.7 | 191.3 | 196.7 | 200.4 | 234.0 | 215.8 | 223.4 | 227.3 | 239.0 | 250.1 | 268.9 | 37.4% | <0.001 |
| 20–44 | 266.9 | 264.9 | 270.7 | 274.5 | 291.9 | 290.0 | 296.3 | 306.0 | 309.2 | 328.6 | 346.4 | 29.8% | <0.001 |
| 45–64 | 100.7 | 102.4 | 106.1 | 110.5 | 116.2 | 118.1 | 121.8 | 127.0 | 128.3 | 135.5 | 142.1 | 41.1% | <0.001 |
| 65+ | 461.0 | 464.1 | 464.0 | 470.3 | 471.5 | 474.8 | 485.9 | 490.6 | 486.6 | 486.2 | 503.0 | 9.1% | <0.001 |
| Sex | |||||||||||||
| Male | 266.4 | 264.7 | 270.1 | 273.6 | 291.7 | 285.9 | 292.5 | 300.1 | 305.1 | 317.2 | 336.0 | 26.2% | <0.001 |
| Female | 300.1 | 299.9 | 307.7 | 315.0 | 338.7 | 333.3 | 341.7 | 351.6 | 356.7 | 372.2 | 390.6 | 30.1% | <0.001 |
| Race/Ethnicity | |||||||||||||
| NH White | 294.5 | 299.4 | 308.8 | 315.3 | 336.8 | 339.6 | 347.9 | 358.2 | 357.4 | 366.8 | 381.1 | 29.4% | <0.001 |
| NH Black | 448.2 | 469.0 | 497.7 | 524.7 | 581.5 | 593.7 | 615.1 | 642.3 | 646.9 | 675.1 | 702.9 | 56.8% | <0.001 |
| Hispanic | 237.1 | 238.9 | 249.5 | 259.5 | 288.8 | 278.1 | 287.8 | 296.8 | 310.6 | 328.0 | 352.9 | 48.8% | <0.001 |
| Other | 185.3 | 191.6 | 199.8 | 199.9 | 214.7 | 211.3 | 213.6 | 215.7 | 217.6 | 230.2 | 249.2 | 34.4% | <0.001 |
| Payer | |||||||||||||
| Private | 171.0 | 166.2 | 168.9 | 174.7 | 196.9 | 180.1 | 186.5 | 181.8 | 186.1 | 184.6 | 181.4 | 6.1% | 0.012 |
| Medicaid | 580.9 | 574.7 | 596.5 | 605.6 | 611.2 | 638.0 | 623.6 | 654.1 | 645.2 | 731.6 | 747.3 | 28.6% | <0.001 |
| Medicare | 459.2 | 490.6 | 492.0 | 501.3 | 497.7 | 496.4 | 516.7 | 539.1 | 529.8 | 528.7 | 536.9 | 16.9% | <0.001 |
| Uninsured/self-pay | 242.2 | 251.5 | 263.6 | 255.8 | 249.0 | 254.4 | 253.5 | 278.9 | 293.8 | 290.8 | 329.7 | 36.1% | 0.002 |
| MSA | |||||||||||||
| Urban | 281.0 | 279.1 | 286.0 | 291.5 | 312.6 | 307.2 | 314.8 | 323.6 | 328.5 | 342.3 | 360.6 | 28.3% | <0.001 |
| Rural | 425.7 | 421.8 | 418.7 | 419.9 | 435.1 | 425.0 | 429.0 | 434.7 | 451.0 | 466.3 | 500.8 | 17.6% | 0.010 |
ED visit rate denominator includes the population of the corresponding characteristic (eg, ED visits by male patients in given year/total male population in given year in CA).
CA, California; ED, emergency department; MSA, metropolitan statistical area; NH, non-Hispanic.