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Table 2 Characteristics of hospitals and ICUs in each time period

From: Changes in hospital mortality for United States intensive care unit admissions from 1988 to 2012

  1988-1989 1993-1996 2001-2003 2004-2006 2007-2009 2010-2012
# of hospitals 40 161 71 57 98 90
Region       
   Northeast 17.5% 19.9% 4.2% 0.0% 16.0% 21.1%
   Southeast 32.5% 29.2% 31.0% 31.6% 27.0% 21.1%
   Midwest 30.0% 23.0% 35.2% 35.1% 33.0% 41.1%
   West 20.0% 28.0% 29.6% 33.3% 24.0% 16.7%
Teaching Status       
   COTH 52.5% 40.4% 16.9% 17.5% 34.0% 54.4%
   Teach, non-COTH 10.0% 19.9% 36.6% 43.9% 37.0% 24.4%
   Non-teach 37.5% 39.7% 46.5% 38.6% 29.0% 21.1%
Bedsize 474 464 453 501 497 473
   # of intensive care units 42 285 166 136 199 180
ICU Type       
   Mixed Medical-Surgical 71.0% 33.3% 36.5% 30.9% 31.5% 36.7%
   Medical 10.0% 19.6% 12.6% 15.4% 19.8% 17.4%
   Surgical 16.0% 22.1% 14.4% 17.7% 21.3% 22.9%
   Other 3.0% 25.0% 36.5% 36.0% 27.4% 22.9%
  1. COTH, Council of Teaching hospitals; Other, cardiothoracic, coronary, neurological, and trauma units