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Predictive properties of novel anthropometric and biochemical indexes for prediction of cardiovascular risk
Diabetology & Metabolic Syndrome volume 16, Article number: 304 (2024)
Abstract
Objective
Our aim was to examine the correlation between CVDs and various anthropometric and biochemical indices in the Iranian population.
Methods
9704 healthy individuals without CVD aged 35–65 were enrolled in our study. The anthropometric indices including Body Adiposity Index (BAI), Abdominal Volume Index (AVI), Body Roundness Index (BRI), Waist to Hip Ratio (WHR), Weight-adjusted Waist Index (WWI), Conicity Index (C-Index), A Body Shape Index (ABSI), Waist to Height Ratio (WHtR), Body Surface Area (BSA), Body Mass Index (BMI), Lipid Accumulation Product (LAP) and Visceral Adiposity Index (VAI) were calculated. The biochemical indices including Cardiac Risk Ratio (CRR), Atherogenic Index of Plasma (AIP), Triglycerides-Glucose Index (TyG), Cardiac Risk Index (CRI), Atherogenic Coefficient (AC), and high-sensitivity C-Reactive Protein (hs-CRP) were investigated. The association of the above indices with CVD was analyzed using logistic regression (LR) and the decision tree (DT) models.
Results
The LR showed age, hs-CRP, AIP, AVI, LAP, and TyG had significant associations with CVDs in men (p-value < 0.002). Also, age, hs-CRP, LAP, TyG, BRI, VAI, and CRR had significant associations with CVDs in women (p-value < 0.002). The DT showed 95% of men with age > = 48, AIP > = 0.94, TyG > = 9.71, and AVI > = 14.24 had CVDs. Also, 97% of women with age > = 54, TyG > = 8.33, and hs-CRP > = 36.69 had CVDs.
Conclusion
Age, TyG, AIP, AVI, hs-CRP and LAP were the best predictors of CVD in men. Moreover, age, TyG, hs-CRP and BAI were the best indicators of CVD in women.
Graphical Abstract

Introduction
Cardiovascular diseases (CVDs) has an important impact on health services in both developed and low-income countries by being the leading cause of premature death [1]. Traditional risk factors for CVD, such as type 2 diabetes mellitus, smoking, hypertension, and dyslipidemia have led to the development of risk prediction models and to major developments in therapy. However, up to 20% of patients with CVD have no conventional risk factors, and 40% have only one [2]. The performance of such strategies in a cost-effective manner is restricted by the limited predictive value of the current risk-assessment models. In this study, we discuss ongoing risk biomarkers and indices to enhance the current risk-stratification metrics for CVD and improve the selection of individuals for preventative strategies [3]. Annual deaths from CVDs are expected to increase to 23.6 million by 2030 [4, 5]. Treatments for CVDs may include pharmacological or surgical procedures which are associated with high costs and side effects [6, 7]. Since prevention is better than cure, it is the most appropriate approach to deal with this widespread health issue [6]. Because CVD is a multifactorial disease, the management of its rapid growth has been challenging [4]. The risk factors for CVDs mainly include aging, genetic susceptibility, smoking, obesity, hyperlipidemia, low level of physical activity, and high blood pressure [8, 9]. Some of the aforementioned risk factors such as age and genetics are non-modifiable but there is still room for change in the management of the modifiable risk factors [4].
Obesity generally defines as excess fat accumulation in the body [10]. Pro-inflammatory cytokines and adipokines that are produced by fat tissue, especially visceral adipose tissue, induce the formation of atherosclerotic plaques and cause cardiovascular dysfunction [11,12,13]. Commonly, obesity is described by body mass index (BMI) [14]. BMI is a simple index that is associated with a higher probability of developing CVD, although it cannot distinguish body fat from muscle (lean tissue) nor can it determine the body fat distribution [14,15,16,17]. In comparison to BMI, waist circumference (WC) is a more suitable index of fat tissue distribution and is positively associated with visceral adiposity [18]. However, using WC alone may not provide accurate information as it can vary depending on the anatomical site of measurement or between different races [19, 20]. Additionally, it is easily influenced by variations in an individual’s height and weight [21]. The waist-to-height ratio (WHtR) has been found to be more effective than BMI and WC in identifying visceral obesity and has a strong association with several cardiometabolic factors [22]. Compared to the traditional anthropometric indices, new indicators have recently gained interest in the literature. Some of these indices include the body roundness index (BRI), abdominal volume index (AVI), a body shape index (ABSI), weight-adjusted waist index (WWI), lipid accumulation product (LAP), visceral adiposity index (VAI), conicity index (C-index), body surface area (BSA), waist-to-hip ratio (WHR), and body adiposity index (BAI). Nevertheless, it is not clear whether these new indices are superior to the traditional ones. Furthermore, the association of these indices with the risk of developing CVDs has not been well-established in large cohorts [7, 23,24,25,26,27].
Dyslipidemia is a well-known risk factor for CVDs and is defined as high total cholesterol (TC), high low-density lipoprotein cholesterol (LDL-C), low high-density lipoprotein cholesterol (HDL-C), and high triglyceride (TG) levels [28]. However, previous studies indicated that LDL-C and HDL-C alone are not suitable screening markers for atherosclerosis risk [29]. Therefore, this issue requires the discovery of new biochemical indices in the prediction of CVD. The triglyceride glucose index (TyG) is a novel marker that is identified as an authentic substitute for insulin resistance [30]. Also, it is an independent risk factor for CVD [31]. Other new indexes include the Cardiac Risk Ratio (CRR), Atherogenic Coefficient (AC), Atherogenic Index of Plasma (AIP), and Cardiac Risk Index (CRI) which have received a lot of attention due to their outstanding role in the CVD diagnosis [29, 32,33,34,35,36,37]. C-reactive protein (CRP) is another factor that plays a noteworthy role in the incidence of CVD [38]. It is produced in the liver and increases during infection or inflammation. Recent studies have shown that a rise in serum CRP level is directly related to an increased risk of CVDs [39]. However, few studies with a large sample and long-term follow-up have investigated the relationship of these indicators with CVD prediction in the Iranian population. Additionally, it is not clear which of these new biochemical indicators can better predict CVD.
Therefore, in this large cohort study we are going to investigate the association of aforementioned anthropometric indices (BAI, WHR, BRI, AVI, WWI, C-Index, WHtR, ABSI, BSA, BMI, LAP and VAI) and biochemical factors (CRR, AIP, TyG, CRI, AC, and hs-CRP) with the risk of developing CVDs.
Material and methods
Study population
An extensive prospective cohort study was part of the MASHAD study on stroke and heart atherosclerosis disorder [40]. Based on the populace of Mashhad, a city located in the northeast of Iran in 2015, the individuals were selected from three regions of the city applying stratified cluster random sampling scheme. Nine sites were created in each region that were centered on Mashhad Healthcare Center divisions. Eligible families were provided with an information brochure about the study by the local population authorities. Following the identification of subjects in this age range, they were contacted to set up a physical examination conducted formally appointment (start in 2007). 82% of the people who answered agreed to take part in the study. Then, A nurse along with two certified health care took notes and collected demographic, anthropometric, and biochemical data. Coronary artery disease, stroke, and PAD were exclusion criteria, along with cancer, chronic kidney disease, and prevalent CVD. The MASHAD cohort study sought to determine the 6-year risk factors and CVD risk among the Mashhad population. Subjects were followed up for CVDs incidence every three years. All patients who reported suspected CVDs during the follow-up years were contacted and consulted with a cardiologist. During the 6 years that the study was followed up, among the 9704 cases that took part in the study. Finally, 235 individuals were confirmed to have been diagnosed with CVDs (myocardial infarction affected 29, unstable angina affected 118, stable angina affected 63, and cardiovascular death affected 25). The remainder of the participants were regarded as subjects who did not have CVD (9469). Flow chart of the paper is depicted in Fig. 1.
The number of individuals who developed CVDs during the follow-up period was much smaller than the number of people who did not. In other words, only 2.4% of people have the disease during the follow-up period. In this case, we are dealing with a data set called "Unbalanced Dataset", which is very common in such studies and occurs when the number of observations in one category is much less or more than in other categories. Thus, in the logistic regression (LR) and decision tree (DT) models, the unbalanced data set was transformed into a balanced model using an algorithm that has been common in this type of studies in the past. In order to transform the unbalanced data set into a balanced one, a Bayesian theory-based approach was used [41]. Incidence of CVDs was investigated after receiving written informed consent from participants. After removing the missing data from each measured variable, the data were analyzed on a balanced dataset and finally with 9529 data as illustrated in Fig. 1. Mashhad University of Medical Sciences' Ethics Committee approved the study in compliance with Code of Ethics IR.MUMS.MEDICAL.REC.1402.023.
Diagnosis of cardiovascular diseases (CVDs)
A physical examination was performed by an expert cardiologist during the 6-year follow-up to determine if the participants have a history of heart disease or not. Participants were evaluated in terms of CVD according to the major adverse cardiovascular events (MACE) criteria which comprised nonfatal cardiovascular disease including stable angina, unstable angina, myocardial infarction (MI), PCI, CABG, HF stroke, PE and DVT along with death from cardiovascular death was defined as death from MI, chronic ischemic heart disease, heart failure, fatal arrhythmia, cerebrovascular, pulmonary thromboembolism, PAD and sudden cardiac arrest [42, 43]. The cardiologist conducted other investigations if they were uncertain about the diagnosis of CVD, which included echocardiography, ETT, radioisotope interventions, and stress echocardiography.
Data collection and anthropometric measurements
Demographic characteristics (such as age and gender), anthropometric information (such as height, weight, BMI, etc.) and biochemical information (such as TG, TC, glucose, etc.) were documented in this database. At the start of the research, all of these variables were measured as previously mentioned [44].
Anthropology measurements were measured by a nurse who was registered. Light clothes and no shoes were asked of participants to measure their weight and height. A stationary stadiometer calibrated to the nearest 0.1 cm was applied to measure height in centimeters, and an electronic scale was applied to measure weight to the nearest 0.1 kg. Then, BMI was used based on the definition of dividing weight (kg) by the square of height (m). The World Health Organization (WHO) defines overweight as having a 25 < BMI < = 29.9 kg/m2 and obese as having a BMI > = 30 kg/m2 [45]. Anthropometric indices were calculated by using the formulas given in Table 1.
Subjects were asked to stand and exhale as part of the measurement process for hip circumference (HC) and WC. The HC was determined by measuring the greatest circumference between the crotch and the iliac crest. All measurements were taken with a retractable tape meter. The calculation of WHR was done by dividing WC by HC. WHTR was calculated by multiplying WC (m) by height (m). According to WHO, men with truncal obesity are referred to as WHR > = 0.95 while women with truncal obesity are referred to as WHR > = 0.8. Men and women, respectively, are classified as having high WC if it is 94 cm or higher, according to International Diabetes Federation (IDF) protocols.
Blood sampling and biochemical measurements
According to standard protocol, the first phase of the study in 2007 consisted of collecting blood samples after a 12–14 h overnight fast from 8 to 10 a.m. in a sitting position, all participants' antecubital veins were measured. Then, the serum and plasma were separated into six aliquots (0.5 ml) by centrifuging at room temperature, the samples should be stored immediately. The MASHAD study biobank was the destination for them in the next stage. The biochemical measurements and indices used in this paper were high-sensitivity C-reactive protein (hs-CRP), HDL, LDL, TC, TG, CRR, AIP, LAP, TyG, CRI, VAI, and AC. Table 1 provided the formulas for calculating biochemical indices. The discussion of laboratory measurements and cut-offs has been detailed [40].
Statistical analysis
The data was analyzed using SAS JMP Pro version 13 (SAS Institute Inc., Cary, NC) and SPSS version 22 (Armonk, NY: IBM Corp.). Mean ± standard deviation (SD) and number with frequency (%) were applied to describe quantitative and qualitative data, respectively. Chi-square test was utilized to measure the relationship between the measured parameters. Variables continuous were compared utilizing a student’s t-test as well. DT and LR methods were employed to examine data. In LR, there is a presentation of the probability of placing every record in the target groups [46,47,48]. A statistical difference can be inferred when the two-tailed p-value is < 0.05. Data mining schemes such as LR and DT have been utilized for analyzing the data.
Logistic regression (LR) modelling
LR is a popular model to investigate the association between several predictor parameters (either continuous or categorical) and binary outcomes in public health, medicine, etc. [46, 47].
The response variable, \({Y}_{i}\), should be marked with either 0 or 1 depending on the outcome of the response. The X vector represents the covariates linked to the response variable and the regression coefficients that correspond to it. As follows, we can investigate the relationship between the binary response and covariates variable:
The important advantage of applying the LR is that it can show the inverse or the direct association between the binary response and input variables.
Decision tree (DT) modelling
In the late twentieth century, data mining emerged as one of the techniques used in artificial intelligence. Data mining is the process of extracting hidden knowledge from large amounts of data. The classification of data is a crucial issue for researchers in this process [47, 49, 50]. Classification problems can be analyzed using various methods [49]. DT has many applications in medical fields [48, 51,52,53]. These fields are heavily influenced by its clarity, simplicity, and ability to extract simple and understandable rules [49]. DT is comprised of component nodes and branches. All records are divided into two or more distinct subsets, resulting in a root node, the first point. The root node and leaf nodes can be connected to the internal nodes in the tree structure through top and bottom connections. When it comes to dividing records into target groups, the final outcomes of the tree are displayed by leaf nodes, which are the third nodes. Branches in the tree indicate how likely it is to place records in target groups from both the internal nodes and root node [54]. DT technique utilizes the Gini impurity index to select the best variable.
where \({P}_{i}\) is the probability that a record in D belongs to the class \({C}_{i}\) and is estimated by |\({C}_{i}\),D|/|D|.
Receiver operating characteristic (ROC) curves were applied to evaluate the accuracy, specificity, and precision for applied methods. Also, the confusion matrix of the methods was given.
Results
Characteristics of the study population
The clinical and demographic characteristics of the study population are summarized in Table 2. Mean ± standard deviation (SD) and frequency (%) were utilized to describe both quantitative and qualitative variables. The follow-up period found that 235 individuals (2.4%) developed CVDs while 9469 (97.6%) were non-CVDs. In general, there was a higher female population in the non-CVD group however male population was higher in CVD group. CVD cases had higher mean age compared to non-CVD cases in both male and female cases (56.09 ± 6.91 and 54.01 ± 6.88 vs. 48.32 ± 8.45 and 47.47 ± 8.05, p-value < 0.001).
The association between anthropometric and biochemical indices and cardiovascular diseases (CVDs) using logistic regression (LR) model
Based on the reported results from the data mining analysis for men (Table 3), age, hs-CRP, BMI, VAI, BAI, and LAP was linked to CVDs in a significant way (p-value = < 0.006). Among the analyzed factors, CVD development was the most strongly related to age, hs-CRP, and LAP (LogWorth column). Our LR model showed that CVDs were not significantly correlated with other investigated parameters. Table 3 (OR column) presents the unit odds ratios that are determined by the significant factor. Age, hs-CRP, BMI, VAI, BAI, and LAP were significantly associated with CVDs. Among these parameters, age and VAI are the main risk factors for CVDs, according to research (OR: 1.08, (95% CI 1.12, 1.14) and 1.31 (1.18, 1.45), respectively).
Based on the reported results from the data mining analysis for women (Table 3), age, hs-CRP, LAP, CRR, TyG, and BRI were linked to CVDs in a significant way (p-value = < 0.004). Among the analyzed factors, CVD development was the most strongly related to Age, hs-CRP, LAP, CRR, and TyG (LogWorth column). Our LR model showed that CVDs were not significantly associated with other investigated parameters. Table 3 (OR column) presents the unit odds ratios that are determined by the significant factor. Age, hs-CRP, LAP, TyG, BRI, and CRR were significantly correlated with CVDs. Among these parameters, TyG and age are the main risk factors for CVDs, according to research (OR: 1.66, (95% CI 1.31, 2.10) and 1.08 (1.07, 1.09), respectively). Table 5 has the confusion matrixes of the models that can be used to evaluate the model.
The association between anthropometric and biochemical indices and cardiovascular diseases (CVDs) using decision tree (DT) model
Figure 2 demonstrates the DT training's results in males, which include anthropometric and biochemical indices. Five layers of risk factors for CVDs were categorized according to the DT algorithm's evaluation. The DT model prioritizes the root variable as the most important variable, with the following variables at the next levels of significance. The most important factor in CVD development risk is age, which is followed by AIP and TyG, as shown in Fig. 2. Participants with age below 48 had higher CVD rates compared to those with younger age according to the DT model in males. In the subgroup with younger age < 48 and lower TyG (TyG < 8.44), 99% of the participants did not have CVDs diagnosed (lowest risk of CVDs). Meanwhile, among those with older age > = 48, AIP > = 0.94, TyG > = 9.71, and AVI > = 14.24, 95% of individuals were determined as CVDs (highest risk of CVD). Table 4 displays the specific rules for CVDs that the DT algorithm creates.
In Fig. 3, female anthropometric and biochemical indices are shown as a result of DT training. As demonstrated in Fig. 3, age holds the greatest importance in predicting CVD development risk, followed by TyG, BRI, and hs-CRP. According to the DT model, individuals who are 54 years or older had higher CVD rates compared to those who are younger. In the subgroup with younger age < 54 and 7.81 < = TyG < = 8.10, 99% of the participants did not have CVDs diagnosed (lowest risk of CVDs). Meanwhile, among those with older age > = 54, TyG > = 8.33, and hs-CRP > = 36.69, 97% of individuals were determined as CVDs (highest risk of CVD Table 4 displays the specific rules for CVDs that the DT algorithm creates. Table 5 contains the confusion matrixes of the models for evaluation. This study is summarized as a graphic abstract in Fig. 4.
Discussion
In this article, we studied the importance of several anthropometric and biochemical indices in predicting the likelihood of developing CVDs. In order to identify the most contributing indices, we used LR and DT. The LR models indicated that in both genders the most important risk factor was age which was followed by hs-CRP. The third index based on the degree of importance in developing CVDs was LAP in females and AIP in males. Based on the ORs for males AIP, TyG and age and for females TyG, BRI, VAI and age significantly increased the chance of developing CVDs. Our findings from DT demonstrated that age was placed as the first root in both genders followed by TyG and AIP as the second root for males and only TyG as the second root for females.
From all of the findings of this study, it can be implied that the results of different models of analysis were in line with each other. For instance, the factors that indicated a strong correlation with the development of CVDs in one model also demonstrated the same effect in the other models. Interestingly, Age and TyG were placed in the highest levels of importance in all of the results.
The LR has been used in various studies for the prediction of CVDs with high accuracy [55, 56]. The generalizability of LR models can be understood by comparing the area under the curve (AUC) in the training and the testing groups [57]. Furthermore, the amount of AUC in the training group is a good representer of diagnostic accuracy in which the AUC of 100% shows perfect accuracy, > = 90% shows outstanding, 80–90% represents excellent, 70–80% is acceptable and values below 50% are interpreted as no discrimination [57]. According to Table 5, the AUC of training and testing groups in had insignificant differences and the AUCs of training groups were in the range of 70–80%. Therefore, our LR analysis represents a generalizable model with acceptable accuracy.
DT modeling has emerged as one of the practical tools for prediction because of the simplicity in interpreting the results, the potential to include nonlinear relationships and the creation of rules [58]. While looking at the DT results, it should be taken into account that the first root has the greatest importance and then the second and the third roots which stand on lower levels. The generalizability of DT models can be understood by comparing the area under the curve (AUC) in the training and the testing groups. As stated in Table 5, the AUC difference between the training and testing group of the DT model is small in both genders. Since the AUCs of training groups in both genders are above 80% the DT model has excellent accuracy.
Our results from the LR model showed that AIP significantly increased the likelihood of CVDs by almost 5 times in males while the highest increase in females belonged to TyG which significantly doubled the chance. Also, in the second root of our DT model, TyG > = 8.44 and AIP > = 0.94 were placed for males and TyG > = 8.33 in one branch and TyG > = 8.1 in another branch for females. Similar to our results, Sadeghi et al. and Kim et al. concluded that AIP could be an independent factor in predicting cardiovascular events [59, 60]. Cai et al. observed an independent association between AIP and acute coronary syndrome, but it should be noted that only a small proportion of their study belonged to females (7%) [35]. Liu et al. conducted a systematic review and meta-analysis that included 12 cohort studies, a potential for positive association was demonstrated between TyG and CVD incidence [61]. Other studies concluded that TyG amount above 8 may indicate an increased chance of CVDs and other mechanisms such as increased insulin resistance, increased atherosclerosis, and inflammation may contribute to this outcome [32, 62, 63].
An interesting finding from our LR model was depicted in LAP ORs in both genders which implied a significant 1–2% decrease in the chance of CVDs. Also, LAP was placed in the third branch of our DT model in males. Although the majority of studies proposed a predictive characteristic of LAP in CVDs [64, 65], a study conducted on the Iranian population with normal BMIs reached statistically insignificant results for the relation between LAP and cardiovascular events [25]. Because WC plays a critical role in calculating LAP, our controversial result may be due to the similarity of WC in our study population of healthy individuals and CVDs.
According to our LR model, age was a significant factor in CVD incidence in both males and females. Moreover, our findings in the DT model depicted age as the first root in both genders (Figs. 2 and 3). In the females group the cut-off for age was 54 while in the males group this cut-off was equal to 48 which is aligned with previous literature that declared men generally develop CVDs at a younger age compared to females [66]. The underlying mechanisms that lead to this result could be the better lipid profile of females at younger ages, lowering of blood pressure as the result of a more potent anti-inflammatory immune profile, different body size distribution, and high levels of estrogen in younger females [67,68,69,70].
Based on our LR and DT models, the AVI (Abdominal Volume Index) only performed well in men for the occurrence of CVDs. Research conducted on a Chinese population revealed that the AVI was not the most effective predictor for coronary heart disease risk in both genders [71]. Although, the AVI has shown to be a promising predictor for other chronic diseases such as metabolic syndrome and diabetes mellitus because of its direct relationship with insulin resistance [72, 73]. Therefore, AVI might also possess a predicting characteristic for CVDs too.
Recent studies have shown that the role of inflammation in the development of atherosclerosis is very important. In recent decades, it has been revealed that hs-CRP is a valuable and independent factor in predicting atherothrombotic and other cardiovascular events [74, 75]. Our results also confirm these findings. Hs-CRP had a significant role in CVD prediction in both genders based on our LR method. Although it was not placed in any of the top 2 branches of the DT model in males and females.
Our two models showed that BRI (Body Roundness Index)) was meaningfully associated with CVD incidence only in females. Same to our results, a study carried out by Wang et al. concluded that BRI was one of the best indicators for coronary heart disease only in females [27]. Moreover, a cohort study indicated that BRI was associated with the risk of developing CVD, and this association was more evident in individuals younger than 55 years [76].
The identified indices could play a pivotal role in refining preventive strategies for CVDs by providing a more individualized risk assessment. For instance, TyG and AIP, indicators associated with lipid and glucose metabolism, could highlight individuals at higher risk due to metabolic dysfunctions even before conventional markers indicate an issue [77]. Recognizing these indices could support more tailored lifestyle modifications, emphasizing targeted dietary adjustments, physical activity, and glucose management strategies specific to each individual's metabolic profile. Additionally, since some indices like VAI and BRI reflect body fat distribution and insulin sensitivity, they could encourage healthcare professionals to place a greater focus on body composition rather than solely on BMI, urging patients toward specific physical activities and nutritional plans that impact visceral fat [78]. By integrating these novel indices into routine assessments, healthcare providers could offer proactive, data-informed guidance to patients, potentially enhancing the efficacy of lifestyle modifications for CVDs prevention and promoting early intervention for those at increased risk.
The usage of data mining methods for investigating the predicting role of novel biochemical and anthropometric indices with CVDs risk in a large-scale population-based sample should be noted as a strong characteristic of this study. Also, our study has some limitations that are worth noting. One of them is that we did not consider genetic and epigenetic issues. Also, we did not examine people over 65 and under 35 years old in our study. The lack of account for genetic and epigenetic variations could have influenced the results, potentially affecting the response to interventions or baseline risk. Limiting the age range could affect the generalizability of the results, potentially overlooking early-onset risk factors or age-related changes. Addressing these gaps in future studies would enhance the applicability of this paper. Also, there was not any information about the cardiovascular medications that patients have taken (statin, aspirin, etc.).
Conclusion
Considering the results of our both machine learning models, TyG, AIP, AVI, hs-CRP and LAP were the best predictors of CVD in men. Moreover, TyG, hs-CRP and BAI were the best indicators of CVD in women. Given these differences in determining the best predictors of CVDs between males and females, gender should also be considered in clinical practice. One of the interesting findings of this study is that TyG has very effective role in predicting CVD in both genders. Due to its ease of measurement and availability in clinical settings, more research should be conducted to determine whether TyG may be a reliable index for predicting cardiovascular events along with current predictors.
Availability of data and materials
The datasets used and/or analyzed during the current study available from the corresponding author on reasonable request.
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Acknowledgements
We would like to thank the MASHAD cohort staff who have participated in running this study.
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Amin Mansoori: drafting the article, Maryam Allahyari: revising the article, Mobina Sadat Mirvahabi: conception, drafting the article, Davoud Tanbakuchi: data analyzing, Sahar Ghoflchi: data analyzing, conception, Elahe Derakhshan-Nezhad: revising the article, Farnoosh Azarian: drafting the article, Gordon Ferns: revising the article, Habibollah Esmaily: corresponding author, Majid Ghayour-Mobarhan: corresponding author.
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All the participants consented to take part in the study by signing written informed consent. The study protocol was reviewed and all methods are approved by the Ethics Committee of Mashhad University of Medical Sciences with approval number IR.MUMS.MEDICAL.REC.1402.023. All methods were carried out in accordance with relevant guidelines and regulations.
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Mansoori, A., Allahyari, M., Mirvahabi, M.S. et al. Predictive properties of novel anthropometric and biochemical indexes for prediction of cardiovascular risk. Diabetol Metab Syndr 16, 304 (2024). https://doi.org/10.1186/s13098-024-01516-4
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DOI: https://doi.org/10.1186/s13098-024-01516-4


