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

Overview of attention for article published in Critical Care, April 2013
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  • In the top 25% of all research outputs scored by Altmetric
  • High Attention Score compared to outputs of the same age (86th percentile)
  • High Attention Score compared to outputs of the same age and source (86th percentile)

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1 blog
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5 X users

Citations

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367 Dimensions

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322 Mendeley
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Title
Changes in hospital mortality for United States intensive care unit admissions from 1988 to 2012
Published in
Critical Care, April 2013
DOI 10.1186/cc12695
Pubmed ID
Authors

Jack E Zimmerman, Andrew A Kramer, William A Knaus

Abstract

INTRODUCTION: A decrease in disease-specific mortality over the last twenty years has been reported for patients admitted to United States (US) hospitals, but data for intensive care patients are lacking. The aim of this study was to describe changes in hospital mortality and case-mix using clinical data for patients admitted to multiple US ICUs over the last 24 years. METHODS: We carried out a retrospective time series analysis of hospital mortality using clinical data collected from 1988 to 2012. We also examined the impact of ICU admission diagnosis and other clinical characteristics on mortality over time. The potential impact of hospital discharge destination on mortality was also assessed using data from 2001 to 2012. RESULTS: For 482,601 ICU admissions there was a 35% relative decrease in mortality from 1988 to 2012 despite an increase in age and severity of illness. This decrease varied greatly by diagnosis. Mortality fell by >60% for patients with chronic obstructive pulmonary disease, seizures and surgery for aortic dissection and subarachnoid hemorrhage. Mortality fell by 51% to 59% for six diagnoses, 41% to 50% for seven diagnoses, and 10% to 40% for seven diagnoses. The decrease in mortality from 2001 to 2012 was accompanied by an increase in discharge to post-acute care facilities and a decrease in discharge to home. CONCLUSIONS: Hospital mortality for patients admitted to US ICUs has decreased significantly over the past two decades despite an increase in the severity of illness. Decreases in mortality were diagnosis specific and appear attributable to improvements in the quality of care, but changes in discharge destination and other confounders may also be responsible.

X Demographics

X Demographics

The data shown below were collected from the profiles of 5 X users who shared this research output. Click here to find out more about how the information was compiled.
Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 322 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
United States 2 <1%
Brazil 1 <1%
Netherlands 1 <1%
Iran, Islamic Republic of 1 <1%
Czechia 1 <1%
Unknown 316 98%

Demographic breakdown

Readers by professional status Count As %
Researcher 41 13%
Student > Master 36 11%
Student > Ph. D. Student 34 11%
Student > Bachelor 31 10%
Other 25 8%
Other 79 25%
Unknown 76 24%
Readers by discipline Count As %
Medicine and Dentistry 142 44%
Nursing and Health Professions 26 8%
Engineering 11 3%
Biochemistry, Genetics and Molecular Biology 7 2%
Computer Science 6 2%
Other 37 11%
Unknown 93 29%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 11. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 28 December 2015.
All research outputs
#3,273,819
of 25,374,647 outputs
Outputs from Critical Care
#2,655
of 6,554 outputs
Outputs of similar age
#26,813
of 205,568 outputs
Outputs of similar age from Critical Care
#20
of 151 outputs
Altmetric has tracked 25,374,647 research outputs across all sources so far. Compared to these this one has done well and is in the 87th percentile: it's in the top 25% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 6,554 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 20.8. This one has gotten more attention than average, scoring higher than 59% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 205,568 tracked outputs that were published within six weeks on either side of this one in any source. This one has done well, scoring higher than 86% of its contemporaries.
We're also able to compare this research output to 151 others from the same source and published within six weeks on either side of this one. This one has done well, scoring higher than 86% of its contemporaries.