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Development of a pediatric age- and disease-specific severity measure
Susan D Horn1, Adalberto Torres, Douglas Willson
1ISIS, Inc, the Institute for Clinical Outcomes Research, and the Department of Pediatrics, Primary Children's Medical Center, Salt Lake City, Utah 84109-1630, USA.
Insights
The pediatric Comprehensive Severity Index (CSI) effectively predicts mortality, length of stay, and cost in hospitalized children. This adapted tool enhances clinical practice by adjusting for patient severity across different providers.
Area of Science:
- Pediatric healthcare research
- Clinical informatics
- Patient outcome prediction
Background:
- The adult Comprehensive Severity Index (CSI) is a tool for assessing patient severity.
- Adapting adult severity indices for pediatric populations is crucial for accurate outcome prediction.
- Existing pediatric severity measures may not fully capture the complexity of illness in hospitalized children.
Purpose of the Study:
- To adapt the adult Comprehensive Severity Index (CSI) for use in hospitalized pediatric patients.
- To evaluate the predictive accuracy of the adapted pediatric CSI for key clinical outcomes.
- To compare the performance of the pediatric CSI against existing pediatric risk assessment tools.
Main Methods:
- A panel of pediatric subspecialists modified the adult CSI.
- Retrospective data from 16,495 pediatric hospital admissions were analyzed.
- Outcomes assessed included mortality, length of stay (LOS), and cost.
Main Results:
- The pediatric CSI demonstrated strong predictive power for mortality (Area Under ROC curve: 0.80-0.99).
- CSI scores explained significant variation in length of stay (R-squared: 0.13-0.67) and cost (R-squared: 0.08-0.73).
- The pediatric CSI showed superior predictability compared to the Pediatric Risk of Mortality score.
Conclusions:
- The adapted pediatric CSI is a reliable tool for predicting mortality, LOS, and cost in hospitalized children.
- The pediatric CSI can aid in standardizing clinical practices and adjusting for severity of illness variations among healthcare providers.
- This validated pediatric severity index supports evidence-based care and resource allocation in pediatric hospitals.
Objectives:
To adapt the adult Comprehensive Severity Index (CSI) for hospitalized pediatric patients and evaluate the ability of the CSI to predict common outcomes.
Study Design:
Adult CSI was modified by a panel of pediatric subspecialists from 10 children's hospitals. Predictive power was evaluated by using retrospective data collected from 16,495 randomly selected children admitted to these hospitals from April 1995 through September 1996. Outcomes were mortality, length of stay (LOS), and cost.
Results:
Admission CSI score predicted mortality well (Hosmer-Lemeshow tests: P =.41-.98) and discriminated well (area under receiver operating characteristic [ROC] curve range = 0.80-0.99) within 9 case-mix groups with > or =10 deaths (P <.0001). Maximum CSI score explained the variation in LOS (r2 = 0.13-0.67) and cost (r2 = 0.08-0.73) within 32 case-mix groups (P <.005). Significant differences existed in admission and maximum average CSI scores across sites in 26 and 29 of 32 case-mix groups, respectively (P <.05). CSI had better predictability than Pediatric Risk of Mortality.
Conclusions:
The age- and disease-specific pediatric CSI score correlates highly with LOS, cost, and mortality in hospitalized children and can help determine the best clinical practices for specific diseases and adjust for differences in severity of illness across providers.