Prediction of In-Hospital Mortality after Emergency Laparotomy Using Glasgow Coma Scale, ASA Physical Status Classification, and P-POSSUM Score

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OBJECTIVE: To determine the importance of the Glasgow Coma scale (GCS), ASA physical status classification system, and P-POSSUM score in predicting mortality among patients undergoing emergency laparotomies. STUDY DESIGN: An analytical study. Place and Duration of the Study: Department of General Surgery, Sheikh Khalifa Bin Zayed Al-Nahyan Hospital Muzaffarabad, Pakistan, from October 2020 to January 2022. METHODOLOGY: All emergency laparotomies performed during the above-mentioned period were included consecutively, excluding trauma laparotomies, re-do laparotomies after elective surgery, appendectomies, cholecystectomies, pancreatectomies, organ transplantation surgeries, and laparotomies due to gynaecological or vascular causes such as ruptured abdominal aortic aneurysm. The GCS scores were broken down into mild (14-15), moderate (9-13), and severe (3-8) categories. The ASA scoring was classified into five classes, i.e., Classes I to V. The P-POSSUM scores were assessed for each of the following five groups: (≤10, 11-20, 21-30, 31-40, and ≥41). RESULTS: Out of 50 patients (mean age: 47 ± 19 years), there were 39 (78%) males and 11 (22%) females. The median values for GCS and P-POSSUM scores were 15 and 11.1, respectively. According to the ASA, most patients (21, 42%) fit into Class II. Twelve (24%) patients died, while 38 (76%) survived. The mortality rate increased with an increasing P-POSSUM score, a lowering GCS score, and a higher class of ASA (all p <0.001). The ROC curve analysis showed that P-POSSUM had the best performance at 0.987, followed by ASA (0.951) and GCS (0.411). CONCLUSION: The ASA Physical Status Classification System and P-POSSUM scoring were significantly predictive of mortality after an emergency laparotomy. KEY WORDS: ASA Physical Status Classification System, Emergency laparotomy, Glasgow coma scale, Mortality, Outcome, P-POSSUM.

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