• Bin Du, Yi Li, Dechang Chen, and Jiaqi Pan.
• Department of Critical Care Medicine, Peking Union Medical College, Beijing 100730, China.
• Zhonghua Yi Xue Za Zhi. 2002 Aug 25;82(16):1111-4.

ObjectiveTo evaluate the efficacy of serun procalcitonin (PCT) and interleukin (IL)-6 in differentiating between severe sepsis and systemic inflammatory response (SIRS) of non-infectious origin.MethodThe serum PCT, IL-6, C-reactive protein (CRP), white blod cell count, percentage of neutrophils, and absolute neutrophil count were determined, and maximal body temperature was recorded among 21 patients was 3.6 (1.8, 27.5) micro g/L, significantly higher than that in SIRS patients (1.3 micro g/L +/- 1.6 micro g/L, P < 0.05). The IL-6 in sepsis patients was 810 ng/L +/- 516 ng/L, significantly higher than that in SIRS patients (235 ng/L +/- 177 ng/L, P < 0.01). However, the differences of CRP, WBC count, percentage of neutrophil, and absolute neutrophil count between the severe sepsis patients and SIRS patients were not statistically significant. PCT and IL-6 showed sensitivity equal or over 80% and specificity equal to or over 70%. The infection score based on PCT and IL-6 showed the best discriminative power to differentiate between severe sepsis and SIRS with the artea under the receiver operating characteristic curve of 0.923.ConclusionIn comparison with the conventional inflammatory markers, PCT and IL-6 are more reliable indicators to differentiate between sepsis and SIRS.

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