EVALUATION OF OHMANN SCORE AND CORRELATION WITH ULTRASOUND FOR DIAGNOSING ACUTE APPENDICITIS
Acute appendicitis is a common surgical condition that requires prompt diagnosis. However a
decision to operate based on the clinical suspicion alone can lead to removal of the normal
appendix in 15-30% cases. Besides the modern imaging techniques, scoring systems, based on
clinical signs and symptoms and routine laboratory assessments, have been used as a diagnostic
aid. However, differences in sensitivities and specificities were observed if the scores were applied
to various populations and clinical settings. The purpose of this paper is to assess the validity of the
Ohmann score and the correlation of ultrasound in diagnosis of acute appendicitis. A total of 80
patients were enrolled in this study, 52 male patients and 28 females patients suspected of acute
appendicitis that were admitted, investigated and treated. After detailed examination and
investigations, the Ohmann score was applied to these patients. A cut off point of 9 was taken.
Patients were divided into two groups, group I score of ≥ 9 and group 2 score of < 9. This study
was conducted at SDM College of Medical Sciences and Hospital Dharwad.Proportion of true
positive for score ≥ 9 is 86.9%, Proportion of true negatives for score <9 is 87.1%. Sensitivity and
specificity of this study being 96% and 66.7%, positive predictive value and negative predictive
value being 82.8 % and 90.9% respectively. Diagnostic odds ratio being 48 and P value of <0.005.
The high scores in Ohmann scoring system is dependable aid in the early diagnosis of acute
appendicitis. Combined with ultrasound, the Ohmann scoring system has high sensitivity and
specificity, in the prediction of acute appendicitis.