Abstract
Background
Evaluating the process of changes in the Metabolic Syndrome (MetS) components over time is one of the ways to study of the MetS natural history. This study aimed to determine the trend of changes in the progression of MetS from its isolated components.
Methods
This longitudinal study was performed on four follow-up periods of the Tehran Lipid and Glucose Study (TLGS) between 1999 and 2015. The research population consisted of 3905 adults over the age of 18 years. MetS was diagnosed based on the Joint Interim Statement (JIS). The considered components were abdominal obesity, hypertension, hyperglycemia, and dyslipidemia.
Results
The highest incidence of MetS from its components was related to hypertension in the short term (3.6-year intervals). In the long run, however, the highest increase in the MetS incidence occurred due to abdominal obesity. Overall, the incidence of MetS increased due to obesity and dyslipidemia, but decreased due to the other factors. Nonetheless, the trend of MetS incidence from all components increased in total. The most common components were dyslipidemia with a decreasing trend and obesity with an increasing trend during the study.
Conclusion
The results indicated that obesity and hypertension components played a more important role in the further development of MetS compared to other components in the Iranian adult population. This necessitates careful and serious attention in preventive and control planning.
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Availability of data and material
The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgments
This article is the result of Pezhman Bagheri’s PhD thesis with registration code: SUMS.98/19936. We have to express our sincere thanks to all the personnel of the Shahid Beheshti University of Medical Sciences (SBMU) research institute for endocrine sciences for respectable cooperation in data collection phase that lead to the outcome of this project.
Funding
This study was financially supported by the Vice-Chancellor for Research and Technology of Shiraz University of Medical Sciences (SUMS), which is worthy of thanks and appreciation.
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P.B. developed the theory and performed the analysis, the literature search, assessed the literature, extracted data, wrote the manuscript with support from D.K. and A.R... A.R. with D.K. also encouraged and supervised the findings of this work, design and implementation of the research. F.A. in data establishment and the planning process of the main study has played a major role. M.S., EKM, and EB. verified the analytical methods and procedures.
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This study was based on the TLGS cohort study data, therefore, it was ethically subject to the ethical considerations considered in this project and was independently the result of a research project approved by the National Ethics Committee on Biomedical Research of Iran under code IR.SUMS.REC.1398.835.
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Khalili, D., Bagheri, P., Seif, M. et al. The dynamics of metabolic syndrome development from its isolated components among Iranian adults: findings from 17 years of the Tehran lipid and glucose study (TLGS). J Diabetes Metab Disord 20, 95–105 (2021). https://doi.org/10.1007/s40200-020-00717-8
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DOI: https://doi.org/10.1007/s40200-020-00717-8