Table 2

Mean and median duration, and total volume of treat-and-release visits at EDs by hospital and area characteristics
Total Visits Mean Duration* Median Duration* 95% Confidence Interval for Mean
All visits 4,955,590 195.7 130.2 (194.2 - 197.2)
Hospital State
Arizona 1,782,239 215.6 180.0 (214.6 - 216.5)
Massachusetts 2,486,172 197.1 139.8 (194.2 - 200.1)
Utah 687,179 138.4 60.0 (137.4 - 139.5)
Hospital Location
Rural 633,670 172.9 120.0 (163.2 - 182.6)
Urban 4,134,985 199.7 135.6 (198.7 - 200.7)
Teaching Status
Teaching 1,427,968 243.8 180.0 (241.2 - 246.4)
Non-teaching 3,313,266 175.6 120.0 (173.6 - 177.5)
Ownership Status
Public 304,453 180.0 120.0 (179.1 - 181.0)
Non-profit 3,516,831 202.5 148.2 (200.4 - 204.6)
For-profit 932,832 178.4 120.0 (177.6 - 179.3)
System Status
Member 1,503,759 187.6 128.4 (185.5 - 189.8)
Non-member 3,264,896 200.1 130.8 (198.0 - 202.1)
Other Characteristics
Non-trauma centers 3,704,109 187.8 121.2 (186.0 - 189.5)
Level 1 trauma centers 708,644 278.2 186.0 (273.0 - 283.4)
Level 2 trauma centers 285,894 140.6 115.2 (139.7 - 141.4)
Level 3 trauma centers 256,943 141.9 112.8 (139.9 - 144.0)
Hospital Bed Size
Small 1,013,957 172.4 121.2 (171.1 - 173.6)
Medium 1,335,735 166.5 120.0 (164.0 - 169.0)
Large 2,418,963 222.2 177.6 (219.5 - 224.9)
Median Household Income**
$1 - $38,999 1,046,901 197.6 129.0 (196.2 - 198.9)
$39,000 - $48,999 1,229,219 198.2 127.2 (194.5 - 201.9)
$49,000 - $63,999 1,178,364 193.8 125.4 (189.1 - 198.4)
$64,000 and over 1,265,601 195.6 139.8 (194.3 - 197.0)

Note: Data include all treat-and-release discharges at emergency departments during 2008 in Arizona, Massachusetts, and Utah.

* Duration is measured in minutes as the difference between admission and discharge time for each visit.

** This is a quartile classification of the estimated median household income of residents in the patient's ZIP Code. Further details are available at http://www.hcup-us.ahrq.gov/db/vars/zipinc_qrtl/nisnote.jsp webcite.

Karaca et al.

Karaca et al. BMC Emergency Medicine 2012 12:15   doi:10.1186/1471-227X-12-15

Open Data