Monitoring Length of Stay of Acute Myocardial Infarction Patients: A Times Series Analysis Using Statistical Process
Fatma Pakdil1, Hannah Beazoglou1
1Department of Management and Marketing, Eastern Connecticut State University, Willimantic, Connecticut.
Summary
Statistical process control (SPC) using I-MR charts effectively monitored length of stay (LOS) for acute myocardial infarction (AMI) patients, revealing a decrease in LOS from 2010-2016 and identifying variations by hospital type and gender.
Area of Science:
- Healthcare Management and Quality Improvement
- Biostatistics and Health Services Research
Background:
- Length of stay (LOS) for acute myocardial infarction (AMI) significantly impacts hospital resource utilization and community health.
- Effective monitoring of AMI patient LOS is crucial for optimizing healthcare delivery and resource allocation.
Purpose of the Study:
- To evaluate the application of statistical process control (SPC) for monitoring the LOS of acute myocardial infarction (AMI) patients in U.S. hospitals.
- To identify trends and variations in AMI patient LOS using control charts.
Main Methods:
- Utilized data from the Healthcare Cost and Utilization Project Nationwide Readmissions Database (2010-2016).
- Analyzed 1,491 patients admitted to public metropolitan hospitals with a primary AMI diagnosis.
- Employed Individual Moving Range (I-MR) charts to monitor LOS across subgroups.
Main Results:
- I-MR charts effectively identified statistically out-of-control signals in AMI patient LOS.
- A significant decrease in LOS was observed between 2010 and 2016.
- LOS was longer in teaching hospitals compared to nonteaching hospitals and longer for female patients than male patients.
Conclusions:
- SPC and control charts offer valuable tools for enhancing decision-making in healthcare organizations.
- Integrating control charts into administrative and medical processes can improve care quality and reduce costs.
- Findings highlight the need to consider hospital characteristics and patient demographics when managing AMI LOS.
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