Predicting Complicated Appendicitis Based on Neutrophil to Lymphocyte Ratio, A Study in University Hospital of Nepal.

Background Acute appendicitis is one of the most common causes of acute abdomen requiring surgical treatment. Accurately diagnosing appendicitis and identifying complicated appendicitis can be difficult at times. Objective To evaluate the ability of the neutrophil-to-lymphocyte ratio (NLR) to differentiate between uncomplicated and complicated appendicitis. Method This was a prospective hospital-based observational study conducted at the Department of Surgery, Dhulikhel Hospital, Kathmandu University Hospital from July 2021 to December 2022. Patients with the clinical diagnosis of acute appendicitis who had undergone emergency appendectomy were included in the study. Informed consent was taken from each patient and data collection was done by filling the proforma. Result A total of 218 patients were included in the study. Male: female ratio was 1.18:1. Mean age of patients was 28.58 ± 16.65 (3-78) years. A significant correlation was found between increasing neutrophil count and neutrophil-to-lymphocyte ratio with complicated appendicitis. However, no significant correlation was found between White Blood Cell counts and complicated appendicitis. Neutrophil-to-lymphocyte ratio > 12.6 was found to be associated with complicated appendicitis. Conclusion A simple, cost-effective, and yet perfect test is not available for identifying complicated appendicitis. Increased Neutrophil count and neutrophil-to-lymphocyte ratio can indicate complicated appendicitis. Elevated WBC counts alone has no role in differentiating complicated appendicitis. According to the results of our study, an neutrophil-to-lymphocyte ratio of 12.6 can help to differentiate complicated from uncomplicated appendicitis.