Abstract：Objective To explore the applicability of the CT appendicitis score(CTAS) in military patients with acute appendicitis(AA). Methods A CTAS system was established through literature review and investigation. The CT examination data on 35 military patients with AA treated between September 2018 and August 2019 served as the AA group, while the CT examination data of 35 non-appendicitis military cases was randomly selected as the non-appendicitis (NA) group. The data on the two groups was retrospectively analyzed and their CTASs were recorded to reveal the difference between the two groups. The optimal cut-off point was determined based on the receiver operating characteristic curve (ROC curve) and the Youden Index (YI) to find out about the efficacy of the CTAS in diagnosing AA. Results The mean score of the AA group was 5.91±1.90, compared with 1.51±1.27 for the NA group, showing significant difference (P=0.001).There were statistically significant differences in the scores of different pathological types in AA group (P=0.001). The higher the CTAS was, the more serious the lesion was. The optimal cut-off point for AA diagnosis was CTAS=3.5(i.e., AA could be diagnosed when CTAS≥4), with a sensitivity of 91.40%, specificity of 94.30% and accuracy of 92.86%. Conclusions When the CTAS is used to diagnose military AA patients, the diagnostic efficiency is high with CTAS≥4.
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2020, Vol. 31 
