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Variation in Patient Characteristics Across Pediatric Intermediate Care Units
Alla L Smith1, Michael S D Agus1, Ekua Cobbina2
1Boston Children's Hospital, Boston, MA.
Insights
Pediatric intermediate care units (PIMCUs) show two models: high-complexity and mixed-complexity. Mixed-complexity PIMCUs had shorter stays, lower readmissions, and fewer ICU transfers, despite similar nurse staffing across units.
Area of Science:
- Pediatric critical care medicine
- Healthcare systems research
Background:
- Pediatric intermediate care units (PIMCUs) play a crucial role in managing children with complex health needs.
- Understanding the structural and patient-level variations within PIMCUs is essential for optimizing care delivery and resource allocation.
Purpose of the Study:
- To characterize pediatric intermediate care units (PIMCUs) and patient demographics.
- To investigate the association between different PIMCU models and key patient outcomes, including hospitalization length of stay, readmission rates, and ICU transfer rates.
Main Methods:
- Retrospective analysis of hospital admissions data from the U.S. Pediatric Health Information Systems database.
- Inclusion of all PIMCU hospitalizations from January 2022 to December 2023.
- Extraction of key demographic, clinical characteristics, and outcomes for 8397 PIMCU encounters across six units.
Main Results:
- All PIMCUs exhibited similar nurse staffing and a focus on respiratory illnesses.
- Two distinct PIMCU models were identified: high-complexity (>75% complex chronic conditions [CCC]) and mixed-complexity (25-75% CCC).
- Mixed-complexity units admitted more patients from the emergency department and had shorter hospital lengths of stay (3 vs. 8 days), lower readmission rates (11% vs. 20.8%), and lower ICU transfer rates (3.9% vs. 7.3%) compared to high-complexity units.
Conclusions:
- Despite similarities in nurse staffing and unit focus, PIMCU models differ significantly in patient population and admission practices.
- Higher complex chronic condition burden in units correlated with increased ICU transfers, readmissions, and longer hospital stays.
- Further research is needed to elucidate the impact of PIMCU models on outcomes and ICU bed utilization; PIMCU patient composition should inform benchmarking.
Objectives:
This study describes pediatric intermediate care unit (PIMCU) and patient-level characteristics and the association of different PIMCU models with key patient and hospitalization outcomes.
Design:
Retrospective analysis of hospital admissions.
Setting:
Registry data from six PIMCUs in the U.S. Pediatric Health Information Systems database.
Patients:
All PIMCU hospitalizations from January 2022 to December 2023.
Interventions:
None.
Measurements:
Key demographic data, clinical characteristics, and outcomes were extracted.
Main Results:
There were 8397 PIMCU encounters included from six units. All included PIMCUs had similar nurse staffing models and commonly cared for patients with respiratory illness. They all cared for a large percentage of patients with complex chronic conditions (CCC), ranging from 31.4% to 94.8%. Compared to high-complexity units (>75% of patients with a CCC; n = 2), mixed-complexity units (25-75% of patients with a CCC; n = 4) were more likely to source patients from the ED (45.1% vs. 20.2%) and prioritize high-acuity/low-complexity diagnoses. Mixed-complexity units had shorter hospital length of stays (median 3 vs. 8 d), lower readmission rates (11% vs. 20.8%), and lower ICU transfer rates (3.9% vs. 7.3%).
Conclusions:
Although all PIMCUs had similarities in nurse staffing, unit structure, and a focus on respiratory illness, we observed two PIMCU models: high-complexity and mixed-complexity units. These two unit types had distinct patient populations, reflecting different admissions practices, with high-complexity units more likely to admit ICU patients and technology-dependent patients. Units with higher CCC patient burden had significantly higher ICU transfer rates, readmission rates, and longer length of stay, associations that we hypothesize are a product of unit complexity. Further investigation is needed to understand the impact of these two PIMCU models on clinical outcomes and appropriate ICU-bed utilization. In the meantime, PIMCU patient composition could be considered when selecting unit benchmarks.
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