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Research
Association Between Serum High-Density Lipoprotein Cholesterol Concentration and Mortality in Critically Ill Patients: A Retrospective Cohort Study
Jia Tian
Hainan General Hospital
Corresponding Author
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Background
This research aims to explore the association between serum high-density lipoprotein cholesterol (HDL-C) and mortality in patients who are critically ill.
Methods
This was a retrospective cohort study. Data were extracted from an online database named ‘Multiparameter Intelligent Monitoring in Intensive Care III (MIMIC III)’. 3384 patients were included, 967 septic patients and 1380 patients with acute kidney injury (AKI) were screened from all the patients included. The association between HDL-C and hospital mortality in all patients, septic patients and AKI patients was evaluated using HDL-C as a design variable.
Results
Serum HDL-C (42.4±18.0 VS 45.0±15.2, P<0.001) concentration was significantly lower for non-survivors than survivors. An arc-shaped relationship between HDL-C and mortality was found for the whole group of patients and the AKI subgroup of patients with inflection point at around 30mg/dL; for septic patients, this relationship became ‘U’-shaped with inflection points at around 30mg/dL and 60mg/dL, respectively. Low HDL-C was associated with increased hospital and ICU mortality, longer ICU length of stay (LOS) and hospital LOS compared with medium HDL-C level for all included patients (p<0.01, all) while the differences between high HDL-C and medium HDL-C group were statistically nonsignificant. Similar patterns were found among AKI subgroup of patients. For the sepsis subgroup, low HDL-C group also showed higher hospital and ICU mortality rate (p<0.001, p=0.002, respectively); however, low HDL-C group did not show longer ICU LOS or hospital LOS. Multivariate logistic regression models showed only low HDL-C(<30mg/dL) were associated with increased hospital mortality in all three models(model 1 OR: 1.44, 95% CI 1.05 to 1.97, p=0.022 ; model 2 OR: 1.51, 95% CI 1.01 to 2.27, p=0.044; model 3 OR: 1.69, 95% CI 1.15 to 2.49, p=0.007). In all three models, age, mechanical ventilation use, Sequential Organ Failure Assessment (SOFA) score and Elixhauser comorbidity score were positively associated with mortality.
Conclusions
Low HDL-C is associated with increased mortality in patients who are critically ill.
Keywords
high-density lipoprotein cholesterol, critically ill, sepsis, acute kidney injury
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This is a preprint. It has not completed peer review.
Research
Association Between Serum High-Density Lipoprotein Cholesterol Concentration and Mortality in Critically Ill Patients: A Retrospective Cohort Study
Jia Tian
Hainan General Hospital
Corresponding Author
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
History
CURRENT STATUS: Posted
Version 1
Posted 22 Sep, 2020
No community comments so far
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Critical Care & Emergency Medicine
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Background
This research aims to explore the association between serum high-density lipoprotein cholesterol (HDL-C) and mortality in patients who are critically ill.
Methods
This was a retrospective cohort study. Data were extracted from an online database named ‘Multiparameter Intelligent Monitoring in Intensive Care III (MIMIC III)’. 3384 patients were included, 967 septic patients and 1380 patients with acute kidney injury (AKI) were screened from all the patients included. The association between HDL-C and hospital mortality in all patients, septic patients and AKI patients was evaluated using HDL-C as a design variable.
Results
Serum HDL-C (42.4±18.0 VS 45.0±15.2, P<0.001) concentration was significantly lower for non-survivors than survivors. An arc-shaped relationship between HDL-C and mortality was found for the whole group of patients and the AKI subgroup of patients with inflection point at around 30mg/dL; for septic patients, this relationship became ‘U’-shaped with inflection points at around 30mg/dL and 60mg/dL, respectively. Low HDL-C was associated with increased hospital and ICU mortality, longer ICU length of stay (LOS) and hospital LOS compared with medium HDL-C level for all included patients (p<0.01, all) while the differences between high HDL-C and medium HDL-C group were statistically nonsignificant. Similar patterns were found among AKI subgroup of patients. For the sepsis subgroup, low HDL-C group also showed higher hospital and ICU mortality rate (p<0.001, p=0.002, respectively); however, low HDL-C group did not show longer ICU LOS or hospital LOS. Multivariate logistic regression models showed only low HDL-C(<30mg/dL) were associated with increased hospital mortality in all three models(model 1 OR: 1.44, 95% CI 1.05 to 1.97, p=0.022 ; model 2 OR: 1.51, 95% CI 1.01 to 2.27, p=0.044; model 3 OR: 1.69, 95% CI 1.15 to 2.49, p=0.007). In all three models, age, mechanical ventilation use, Sequential Organ Failure Assessment (SOFA) score and Elixhauser comorbidity score were positively associated with mortality.
Conclusions
Low HDL-C is associated with increased mortality in patients who are critically ill.
Figure 1
Figure 2