Re-evaluation of the sepsis score in equine neonates.

This research paper evaluates the effectiveness of the modified sepsis scoring system in identifying sepsis in foals. The study analyzes data from neonatal admissions to the University of Florida Large Animal Hospital from 1982 to 2008, ultimately concluding that the sepsis score’s sensitivity and specificity were not as high as previously reported. However, the score performs better than a regression model based on objective clinical data.

Study Objective and Methods

• The main objective of the study was to assess the sensitivity and specificity of the modified sepsis score in a larger population of foals. Sensitivity and specificity are statistical measures of a test’s performance and reflect its ability to identify true positives (sensitivity) and true negatives (specificity).
• A secondary objective was to identify factors associated with sepsis in foals.
• The study was conducted through retrospective cohort study methods, examining records of neonatal admissions to the University of Florida Large Animal Hospital from 1982 to 2008.
• Multivariable logistic regression was used to identify objective clinical factors associated with sepsis. This is a statistical process that analyses a dataset to predict the probabilities of certain outcomes based on one or more independent variables.
• A Receiver Operating Characteristic (ROC) curve analysis was conducted on the modified sepsis score to find an optimal cut-off point for diagnosing sepsis.

Study Results

• The study involved 1065 foals. The modified sepsis score had a sensitivity of 56.4% and specificity of 73.4% for the original cut-off point (greater than 11).
• The ROC analysis revealed an optimal cut-off point of greater than 7 (with sensitivity at 84.4% and specificity at 41.8%). This lower cut-off point provided a higher rate of correctly identified foals with sepsis (sensitivity), but also resulted in more false positive rates (lower specificity).
• The modified sepsis score performed better in identifying septic foals than the generated regression model including factors such as age, creatinine levels, lymphocyte count, potassium levels, and Immunoglobulin G (IgG) levels above 8 g/l.

Study Conclusions

• While the sensitivity and specificity of the modified sepsis score were not as high as previously reported, it still outperformed the regression model derived from objective clinical data. Therefore, the study affirmed its value in the early diagnosis of sepsis in foals.
• The performance of the modified sepsis score did not change significantly over the multi-year period studied, suggesting its consistent utility over time.
• The optimal cut-off point for the score shifted to a lower value during the study, indicating a need for possible adjustment in future clinical application.