JOURNAL ARTICLE

[Combination of Weighted index of comorbidities and sepsis-related organ failure assessment score in death risk evaluation of septic patients]

Yunliang Cui, Yu Li, Shuliu Zhang, Huili Li, Dechang Chen, Zhaofen Lin, Zhaotao Tian
Zhonghua Wei Zhong Bing Ji Jiu Yi Xue 2014, 26 (1): 41-5
24649524

OBJECTIVE: To predict the risk of 28- day mortality on septic patients in intensive care unit (ICU) with the combination of the Weighted index of comorbidities (WIC) and sepsis-related organ failure assessment (SOFA) score.

METHODS: The clinical data of adult sever sepsis/ septic shock patients in Department of Emergency Medicine of Chagzeng Hospital and Department of Clinical Care Medicine of Jinan Military General Hospital from October 2011 to February 2013 were analyzed retrospectively. The etiological factor, past history, having sever sepsis or not were recorded. Age score, WIC score, acute physiology and chronic health evaluation II (APACHE II) score and SOFA score were calculated at or 24 hours after admission. The logistic regression was used and the receiver operating characteristic curve (ROC curve) was drawn to calculate the patients' outcome.

RESULTS: In 310 enrolled patients, 223 (71.9%) patients survived and 87 (28.1%) died. Univariate analysis showed the P values of the age score, WIC score, APACHE II score and SOFA score. chronic cardiac insufficiency, type 2 diabetes, cerebrovascular disease, tumor, multiple injury, pulmonary infection and having severe sepsis or not were all less tha 0.2. The above 11 variables were put into the multivariate logistic regression equation 1, of which predicted probability was reserved. It revealed that 5 variables were independently associated with 28-day prognosis, of which influence power in descending order were SOFA score [odds ratio (OR)=1.308, 95 % confidence interval (95% CI): 1.158-1.478, P=0.000], having sever sepsis or not (OR=0.206, 95% Cl:0.100-0.424, P=0.000), APACHE II score (OR=1.090, 95% CI:1.021-1.164, P=0.010) WIC score (OR=1.441, 95% CI:1.067-1.947, P=0.017) age score (OR=1.228, 95% CI:1.027-1.468, P=0.024), the Wals were 18.554, 18.369, 6.725, 5.662, 5.067, respectively. The 3 variables, age score, WIC score and SOFA score, were brought into the multivariate logistic regression equation 2, of which predicted probability was reserved too. It revealed that age score (OR=1.330, 95 % CI: 1.145-1.546, P=0.000), WIC score (OR=1.496, 95% CI: 1.145-1.546, P=000) and SOFA score (OR=1.429, 95% CI: 1.303-1.567, P=0.000), were independently associated with the septic patients’ 28-day prognosis. There was no significant difference in the area under receiver operating characteristics curve (AUC) between the SOFA score and APACHE II score (0.784 vs. 0.780, Z=0.014, P=0.989). However, compared with APACHE II score, the AUC of equation 1 (0.888) and 2 (0.851) were much more (Z=4.333, P= 0.000; Z= 2.669, P= 0.008).

CONCLUSION: The sensitivity of 28-day prognosis 28-day prognosis by WIC score was improved greatly with the combination of SOFA score and age score.

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