reliability of modified Alvarado score as a tool for diagnosis of acute appendicitis in Sudanese adults

ABSTRACT

Decision making in cases of acute appendicitis may be difficult especially for junior surgeons as diagnosis of that condition is sometimes difficult. In conditions like acute appendicitis, it is not possible to have definitive diagnosis by gold standard test [histopathology] before surgery, so various diagnostic modalities are introduced to establish accurate diagnosis. Modified Alvarado score [MAS] system is one of the examples. This work was carried out to evaluate the reliability and sensitivity of modified Alvarado scoring system in Sudanese adult patients with suspected diagnosis of acute appendicitis This prospective study included 866 [452 males and 414 females] who underwent appendicectomy in different centers in Khartoum, Sudan in the period from January 2006 to August 2007. It included all adult patients above 16 years with clinical diagnosis of acute appendicitis. Modified Alvarado score system was calculated for all patients; however decision to operate was clinical.The results showed that the overall sensitivity, specificity and accuracy were 87.78%, 24.78% and 79e.56% respectively. Our data suggested that the modified Alvarado scoring system had little applicability to the local adult population. Its sensitivity was high but the specificity was too low. So, we conclude that the modified Alvarado scoring system is not accurate in the diagnosis of suspected cases of acute appendicitis in Sudanese adult patients