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Identifying Risk Indicators of Cardiovascular Disease in Fasa Cohort Study (FACS): An Application of Generalized
Fariba Asadi1, Reza Homayounfar2, Mojtaba Farjam3
1Department of Biostatistics, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Insights
Cardiovascular disease (CVD) prediction was improved using a generalized linear mixed model (GLMM) tree. This statistical framework offers simpler interpretation and fewer assumptions for proactive patient detection planning.
Area of Science:
- Epidemiology
- Biostatistics
- Public Health
Background:
- Cardiovascular disease (CVD) is a leading global cause of mortality.
- Accurate prediction of CVD is crucial for public health initiatives.
- Early detection frameworks are needed to mitigate CVD impact.
Purpose of the Study:
- To predict cardiovascular disease (CVD) using key indicators.
- To develop and evaluate a tree-based statistical framework for CVD detection.
- To compare the predictive performance of different statistical models for CVD.
Main Methods:
- Utilized baseline data from the Fasa Cohort Study (FACS).
- Fitted ordinary Tree, generalized linear mixed models (GLMM), and GLMM tree models.
- Compared predictive power using metrics like Area Under the Curve (AUC) and specificity/sensitivity.
Main Results:
- Analyzed data from 9499 participants aged 35-70 years.
- Identified age, cholesterol, smoking, glucose, and family history as significant CVD predictors.
- GLMM achieved the highest AUC (0.81), closely followed by the GLMM tree (0.80), outperforming the ordinary tree (0.58).
Conclusions:
- The GLMM tree offers a simpler interpretation and fewer assumptions compared to standard tree models.
- The GLMM tree demonstrates comparable performance to GLMM for CVD prediction.
- Updated statistical models like the GLMM tree can enhance proactive patient detection and planning for CVD.
Background:
Today, cardiovascular disease (CVD) is the most important cause of death around the world. In this study, our main aim was to predict CVD using some of the most important indicators of this disease and present a tree-based statistical framework for detecting CVD patients according to these indicators.
Methods:
We used data from the baseline phase of the Fasa Cohort Study (FACS). The outcome variable was the presence of CVD. The ordinary Tree and generalized linear mixed models (GLMM) were fitted to the data and their predictive power for detecting CVD was compared with the obtained results from the GLMM tree. Statistical analysis was performed using the RStudio software.
Results:
Data of 9499 participants aged 35‒70 years were analyzed. The results of the multivariable mixed-effects logistic regression model revealed that participants' age, total cholesterol, marital status, smoking status, glucose, history of cardiac disease or myocardial infarction (MI) in first- and second-degree relatives, and presence of other diseases (like hypertension, depression, chronic headaches, and thyroid disease) were significantly related to the presence of CVD (P<0.05). Fitting the ordinary tree, GLMM, and GLMM tree resulted in area under the curve (AUC) values of 0.58 (0.56, 0.61), 0.81 (0.77, 0.84), and 0.80 (0.76, 0.83), respectively, among the study population. In addition, the tree model had the best specificity at 81% but the lowest sensitivity at 65% compared to the other models.
Conclusion:
Given the superior performance of the GLMM tree compared with the standard tree and the lack of significant difference with the GLMM, using this model is suggested due to its simpler interpretation and fewer assumptions. Using updated statistical models for more accurate CVD prediction can result in more precise frameworks to aid in proactive patient detection planning.
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