This study aims to evaluate procalcitonin (PCT) as a biomarker for diagnosing bacterial infections in various infectious diseases. Procalcitonin has shown potential in distinguishing bacterial from viral infections, particularly in conditions like pneumonia, sepsis, and urinary tract infections. The study will be a retrospective, cross-sectional analysis of patient records from a hospital, focusing on those diagnosed with bacterial infections and tested for PCT levels. We will assess the sensitivity, specificity, and predictive value of PCT in comparison to other diagnostic methods such as cultures, imaging, and clinical signs.
The primary goal is to determine whether procalcitonin can accurately guide the diagnosis and management of bacterial infections, potentially reducing unnecessary antibiotic use. Data will be collected from patients aged 18 or older, including clinical details, PCT levels, and microbiological results. Statistical analysis will include evaluating the diagnostic performance of PCT using ROC curve analysis and comparing it to other biomarkers like C-reactive protein (CRP).
By evaluating the clinical utility of PCT, this study aims to enhance infection management, improve antibiotic stewardship, and contribute to better patient outcomes in infectious disease care.