The Karaman score: A new diagnostic score for acute appendicitis

Current clinical practice lacks a definitive non-invasive method to distinguish acute appendicitis from negative appendectomy. While existing scoring systems like the Alvarado score are widely used, their diagnostic accuracy remains suboptimal. Prior research has shown that clinical scores can improve decision-making, but gaps persist in sensitivity and specificity. No prior work had resolved the comparative utility of newer scoring systems. This uncertainty drove the need for alternative diagnostic tools. Researchers have explored various combinations of clinical signs and symptoms, but no system has achieved high predictive accuracy. The need for a more reliable scoring system remains unmet in surgical diagnostics. This gap motivated the development and evaluation of the Karaman score. The study aimed to address this uncertainty in acute appendicitis diagnosis.

The study aimed to evaluate the diagnostic performance of the Karaman score for acute appendicitis. It sought to compare this new score with the established Alvarado score. The specific problem addressed was the diagnostic uncertainty in distinguishing acute appendicitis from negative appendectomy. The motivation stemmed from the limitations of current diagnostic tools in surgical settings. The researchers wanted to determine if the Karaman score could offer better predictive accuracy. The study focused on a cohort of patients who underwent appendectomy procedures. It aimed to assess sensitivity, specificity, and predictive values of the Karaman score. The goal was to establish whether this new score could improve clinical decision-making.

The study enrolled 200 patients who had undergone appendectomy procedures. Researchers used a research registry with the number 2290 to track participants. The diagnostic performance of the Karaman score was evaluated using standard statistical metrics. The Alvarado score was also assessed for comparison purposes. Multivariate logistic regression analysis was employed to assess predictive power. Age and gender were included as covariates in the regression models. The cutoff thresholds for both scores were determined based on diagnostic accuracy. The study compared sensitivity, specificity, PPV, and NPV of both scoring systems.

The Karaman score achieved 84.3% sensitivity and 64.7% specificity in diagnosing acute appendicitis. It had a PPV of 92.1% and NPV of 45.8% at a cutoff of ≥9. The Alvarado score showed 72.9% sensitivity and 70.6% specificity at a cutoff of ≥8. Its PPV was 92.4%, but NPV was 34.8%. In multivariate analysis, the Karaman score ≥9 had an OR of 10.374 (p<0.001). The Alvarado score ≥8 had an OR of 6.644 (p<0.001). When combined, the Alvarado score lost predictive power (OR:1.838, p=0.347). The Karaman score retained significance (OR:6.586, p=0.003). These results suggest the Karaman score is more predictive than the Alvarado score.

The Karaman score demonstrated higher diagnostic accuracy than the Alvarado score in this study. At a cutoff of ≥9, it showed better sensitivity and predictive values. The Alvarado score's predictive power diminished when combined with the Karaman score. The Karaman score retained statistical significance in multivariate analysis. These findings suggest the Karaman score may be a more reliable tool. The study supports its potential use in clinical decision-making. No prior work had resolved the comparative utility of these scores. The authors propose that the Karaman score could improve diagnostic confidence in surgical settings.