Table 3 Characteristics of ICU patients admitted during each time period.
From: Changes in hospital mortality for United States intensive care unit admissions from 1988 to 2012
Cohort | 1988-1989 | 1993-1996 | 2001-2003 | 2004-2006 | 2007-2009 | 2010-2012 |
|---|---|---|---|---|---|---|
# Admissions | 17,440 | 37,668 | 110,534 | 101,031 | 113,743 | 102,225 |
Age (mean) | 59.3 | 59.6 | 61.9 | 61.4 | 61.3 | 61.4 |
APS (mean) | 39.3 | 34.2 | 39.0 | 39.3 | 42.0 | 42.2 |
≥ 1 chronic health conditions | 12.0% | 13.3% | 10.0% | 14.9% | 14.8% | 14.0% |
% on ventlator, day 1 | 33.9% | Not Available | 39.6% | 37.9% | 39.7% | 36.0% |
Location before admission | Â | Â | Â | Â | Â | Â |
   Post-operative | 42.3% | 30.3% | 35.8% | 34.7% | 26.5% | 23.1% |
   Emergency Room | 35.5% | 39.0% | 33.3% | 32.9% | 37.7% | 37.8% |
   Floor/Dir Adm/Other | 16.4% | 16.5% | 12.9% | 12.5% | 14.6% | 13.7% |
   Other hospital | 2.4% | 7.7% | 8.8% | 8.1% | 12.3% | 15.7% |
   ICU transfer | 3.3% | 3.7% | 5.7% | 7.1% | 3.5% | 2.0% |
   Step down unit | N/A | 2.9% | 3.6% | 4.7% | 5.4% | 7.7% |
% Emergency surgery | 9.0% | 6.4% | 4.5% | 5.5% | 5.4% | 4.9% |
% Race = white | 80.3% | 78.0% | 73.9% | 75.8% | 78.2% | 79.2% |
ICU LOS (mean days) | 4.64 | 4.30 | 3.43 | 3.86 | 3.96 | 3.58 |
Hospital LOS (mean days) | 15.6 | 11.6 | 10.0 | 10.9 | 10.8 | 9.7 |
Hospital Mortality % | 17.3% | 12.4% | 12.6% | 11.9% | 12.1% | 11.3% |