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Risk prediction model for distinguishing Gram-positive from Gram-negative bacteremia based on age and cytokine levels: A retrospective study.
Zhang, Wen; Chen, Tao; Chen, Hua-Jun; Chen, Ni; Xing, Zhou-Xiong; Fu, Xiao-Yun.
Afiliación
  • Zhang W; Department of Critical Care Medicine, The Affiliated Hospital of Zunyi Medical University, Zunyi 563000, Guizhou Province, China.
  • Chen T; Department of Critical Care Medicine, The Affiliated Hospital of Zunyi Medical University, Zunyi 563000, Guizhou Province, China.
  • Chen HJ; Department of Critical Care Medicine, The Affiliated Hospital of Zunyi Medical University, Zunyi 563000, Guizhou Province, China.
  • Chen N; Department of Critical Care Medicine, The Affiliated Hospital of Zunyi Medical University, Zunyi 563000, Guizhou Province, China.
  • Xing ZX; Department of Critical Care Medicine, The Affiliated Hospital of Zunyi Medical University, Zunyi 563000, Guizhou Province, China.
  • Fu XY; Department of Critical Care Medicine, The Affiliated Hospital of Zunyi Medical University, Zunyi 563000, Guizhou Province, China. 422318085@qq.com.
World J Clin Cases ; 11(20): 4833-4842, 2023 Jul 16.
Article en En | MEDLINE | ID: mdl-37583991
ABSTRACT

BACKGROUND:

Severe infection often results in bacteremia, which significantly increases mortality rate. Different therapeutic strategies are employed depending on whether the blood-borne infection is Gram-negative (G-) or Gram-positive (G+). However, there is no risk prediction model for assessing whether bacteremia patients are infected with G- or G+ pathogens.

AIM:

To establish a clinical prediction model to distinguish G- from G+ infection.

METHODS:

A total of 130 patients with positive blood culture admitted to a single intensive care unit were recruited, and Th1 and Th2 cytokine concentrations, routine blood test results, procalcitonin and C-reactive protein concentrations, liver and kidney function test results and coagulation function were compared between G+ and G- groups. Least absolute shrinkage and selection operator (LASSO) regression analysis was employed to optimize the selection of predictive variables by running cyclic coordinate descent and K-fold cross-validation (K = 10). The predictive variables selected by LASSO regression analysis were then included in multivariate logistic regression analysis to establish a prediction model. A nomogram was also constructed based on the prediction model. Calibration chart, receiver operating characteristic curve and decision curve analysis were adopted for validating the prediction model.

RESULTS:

Age, plasma interleukin 6 (IL-6) concentration and plasma aspartate aminotransferase concentration were identified from 57 measured variables as potential factors distinguishing G+ from G- infection by LASSO regression analysis. Inclusion of these three variables in a multivariate logistic regression model identified age and IL-6 as significant predictors. In receiver operating characteristic curve analysis, age and IL-6 yielded an area under the curve of 0.761 and distinguished G+ from G- infection with specificity of 0.756 and sensitivity of 0.692. Serum IL-6 and IL-10 levels were upregulated by more than 10-fold from baseline in the G- bacteremia group but by less than ten-fold in the G+ bacteremia group. The calibration curve of the model and Hosmer-Lemeshow test indicated good model fit (P > 0.05). When the decision curve analysis curve indicated a risk threshold probability between 0% and 68%, a nomogram could be applied in clinical settings.

CONCLUSION:

A simple prediction model distinguishing G- from G+ bacteremia can be constructed based on reciprocal association with age and IL-6 level.
Palabras clave

Texto completo: 1 Base de datos: MEDLINE Tipo de estudio: Etiology_studies / Observational_studies / Prognostic_studies / Risk_factors_studies Idioma: En Revista: World J Clin Cases Año: 2023 Tipo del documento: Article País de afiliación: China

Texto completo: 1 Base de datos: MEDLINE Tipo de estudio: Etiology_studies / Observational_studies / Prognostic_studies / Risk_factors_studies Idioma: En Revista: World J Clin Cases Año: 2023 Tipo del documento: Article País de afiliación: China