Understanding the trends of PCT and NLR concerning the infection source can provide deeper insights into their diagnostic and prognostic capabilities.

This comparative analysis of PCT, NLR, and SOFA score trends contributes to the improvement of patient outcomes through accurate assessment of sepsis severity and progression, early diagnosis, and timely intervention.

This was a prospective observation study of ICU sepsis patients from different infection sources.

Procalcitonin and NLR levels were measured on days 0, 2, and 4 of admission. Sequential organ failure assessment scores on these days were also analyzed.

The cut-off values were obtained for predicting the prognosis of sepsis ICU patients.

The study included 100 sepsis patients with an equal distribution of males and females and a mean age of 72 years.

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