Intensive care unit occupancy and patient outcomes

Area of Science:

• Critical Care Medicine
• Health Services Research
• Hospital Operations

Background:

• Higher patient volume in intensive care units (ICUs) may correlate with better outcomes.
• Limited data exist on the impact of increased patient loads within ICUs on patient outcomes.

Purpose of the Study:

• To investigate the relationship between ICU occupancy levels and patient outcomes within the same ICU.
• To determine if high patient census days impact inpatient outcomes.

Main Methods:

• Analysis of 200,499 patients across 108 ICUs using the APHQ-IV database (2002-2005).
• Comparison of patient outcomes based on daily ICU census (high vs. low) on admission day.
• Conditional logistic regression controlling for patient severity of illness.

Main Results:

• No significant difference in inpatient mortality or hospital transfer rates for patients admitted on high census days compared to average or low census days.
• Findings remained consistent across various definitions of high census and in subgroup analyses.

Conclusions:

• ICUs in this study function as high-reliability organizations.
• ICUs effectively manage varying operational demands without compromising patient mortality outcomes.
• The capacity of ICUs to scale operations ensures consistent patient care quality.