Key result
Preinjury ASA class 4 predicts ~7.5-fold higher 30-day readmission odds versus class 1.
Why the study?
There is heterogeneity in defining preinjury health status as a predictor of readmission after trauma, and the validity of the ASA Physical Status score compared to the Charlson Comorbidity Index is unclear.
Does the preinjury ASA score independently predict readmission after major traumatic injury compared to the Charlson Comorbidity Index?
Population
4732 adult trauma patients admitted to the Ottawa Hospital from 2004 to 2014
Comparison
Preinjury ASA Physical Status score vs Charlson Comorbidity Index
Design
Single-center retrospective cohort study
Follow-up
6 months
Authors
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May support ASA-based readmission risk stratification after trauma; leaves open prospective validation against Charlson index before practice change.
Cohort (n=4,732)
No
Does the preinjury ASA score independently predict readmission after major traumatic injury compared to the Charlson Comorbidity Index?
Odds Ratio: 7.52 (95% CI 4.72–11.99)
p-value: p=<0.0001
The preinjury ASA score is a strong independent predictor of readmission after traumatic injury, outperforming the Charlson Comorbidity Index at 30 days and 3 months.
Tran et al. (2017) conducted a cohort in Major traumatic injury (n=4,732). Higher preinjury ASA score (Class 4) vs. ASA Class 1 (healthy) was evaluated on Readmission to hospital within 30 days (OR 7.52, 95% CI 4.72-11.99, p=<0.0001). Higher preinjury ASA scores independently predicted hospital readmission at 30 days, with ASA class 4 patients demonstrating 7.52-fold higher odds of readmission compared to healthy ASA class 1 patients.
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