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Do Autopsies Still Matter? The Influence of Autopsy Data on Final Injury Severity Score Calculations.
Journal of Surgical Research 2019 January
BACKGROUND: Despite a proven record of identifying injuries missed during clinical evaluation, the effect of autopsy on injury severity score (ISS) calculation is unknown. We hypothesized that autopsy data would alter final ISS and improve the accuracy of outcome data analyses.
MATERIALS AND METHODS: All trauma deaths from January 2010 through June 2014 were reviewed. Trauma registrars calculated Abbreviated Injury Scale and ISS from clinical documentation alone. The most detailed available autopsy report then was reviewed, and AIS/ISS recalculated. Predictors of ISS change were identified using multivariate logistic regression.
RESULTS: Seven hundred thirty-nine deaths occurred, of which 682 (92.3%) underwent autopsy (31% view-only, 3% with preliminary report, and 66% with full report). Patients undergoing full autopsy had a lower median age (39 versus 74 years, P < 0.01), a higher rate of penetrating injury (41.7% versus 0%, P < 0.01), and a higher emergency department mortality rate (30.8% versus 0%, P < 0.01) than those receiving view-only autopsy. Incorporating autopsy findings increased mean ISS (21.3 to 29.6, P < 0.001) and the percentage of patients with ISS ≥ 25 (49.9% to 69.2%, P < 0.001). Multivariate analysis identified length of stay, death in the emergency department, full rather than view-only autopsy, and presenting heart rate as variables associated with ISS increase.
CONCLUSIONS: Autopsy data significantly increased ISS values for trauma deaths. This effect was greatest in patients who died early in their course. Targeting this group, rather than all trauma patients, for full autopsy may improve risk-adjustment accuracy while minimizing costs.
MATERIALS AND METHODS: All trauma deaths from January 2010 through June 2014 were reviewed. Trauma registrars calculated Abbreviated Injury Scale and ISS from clinical documentation alone. The most detailed available autopsy report then was reviewed, and AIS/ISS recalculated. Predictors of ISS change were identified using multivariate logistic regression.
RESULTS: Seven hundred thirty-nine deaths occurred, of which 682 (92.3%) underwent autopsy (31% view-only, 3% with preliminary report, and 66% with full report). Patients undergoing full autopsy had a lower median age (39 versus 74 years, P < 0.01), a higher rate of penetrating injury (41.7% versus 0%, P < 0.01), and a higher emergency department mortality rate (30.8% versus 0%, P < 0.01) than those receiving view-only autopsy. Incorporating autopsy findings increased mean ISS (21.3 to 29.6, P < 0.001) and the percentage of patients with ISS ≥ 25 (49.9% to 69.2%, P < 0.001). Multivariate analysis identified length of stay, death in the emergency department, full rather than view-only autopsy, and presenting heart rate as variables associated with ISS increase.
CONCLUSIONS: Autopsy data significantly increased ISS values for trauma deaths. This effect was greatest in patients who died early in their course. Targeting this group, rather than all trauma patients, for full autopsy may improve risk-adjustment accuracy while minimizing costs.
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