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The Relationship Between Prognostic Nutritional Index and All-Cause Mortality in Critically Ill Patients: A

Yan Lu¹, Chaoxiang Ren¹, Jinwen Jiang¹

¹Clinical Laboratory, DongYang People's Hospital, Dongyang, 322100, Zhejiang, People's Republic of China.

International Journal of General Medicine

|July 26, 2021

Abstract

Purpose:

The effectiveness and prognostic value of the prognostic nutritional index (PNI) in critically ill patients are unknown. Hence, this study aimed to analyze the relationship between the PNI and all-cause mortality in critically ill patients.

Patients And Methods:

Patient data were obtained from the Multiparameter Intelligent Monitoring in Intensive Care III database. The relationship between the PNI and in-hospital mortality was analyzed using receiver operating characteristic curve analysis and a logistic regression model. Propensity score matching (PSM) was used to eliminate the bias caused by confounding factors. The Kaplan-Meier curve and Cox regression model were used to test the effect of the PNI on 30-, 90-, 180-, and 365-day mortality.

Results:

A low PNI score is an independent risk factor for in-hospital mortality in critically ill patients. A total of 3644 cases were successfully matched using PSM. The PSM group with balanced covariates obtained similar results in the three models, which were statistically significant. The Kaplan-Meier curve and Cox regression model showed that the PNI was negatively correlated with 30-, 90-, 180-, and 365-day all-cause mortality.

Conclusion:

The PNI score is an independent risk factor for all-cause mortality in critically ill patients, where a low PNI score is associated with increased mortality.

Keywords:

critically ill patients mortality prognostic nutritional index propensity score matching

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