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Associations of plasma high-density lipoprotein cholesterol with clinical chemistry data
Insights
Thyroid hormones and certain clinical chemistry tests show associations with high-density lipoprotein (HDL) cholesterol levels. However, these factors are not major determinants of HDL cholesterol in the general population.
Area of Science:
- Clinical Chemistry
- Cardiovascular Health
- Endocrinology
Background:
- High-density lipoprotein (HDL) cholesterol plays a crucial role in cardiovascular health.
- Understanding factors influencing HDL cholesterol levels is vital for disease prevention.
- Previous research has explored various associations, but comprehensive analysis is ongoing.
Purpose of the Study:
- To investigate associations between HDL cholesterol and a range of clinical chemistry tests.
- To identify potential regulatory roles of specific biomarkers in HDL cholesterol levels.
- To determine the significance of these associations in a broad population sample.
Main Methods:
- Analysis of data from the Lipid Research Clinics Program Prevalence Study.
- Statistical examination of correlations between HDL cholesterol and multiple clinical chemistry parameters.
- Stratification of analysis by age and sex to identify specific demographic patterns.
Main Results:
- Negative association found between serum thyroxine and HDL cholesterol across various age groups.
- Hyperglobulinemia linked to lower HDL cholesterol in middle-aged women.
- Weak negative associations observed between HDL cholesterol and serum uric acid and plasma glucose in specific demographics.
- Elevated serum bilirubin and aspartate aminotransferase (AST) correlated with higher HDL cholesterol in certain groups.
- Negative association between alkaline phosphatase and HDL cholesterol in women and young men.
Conclusions:
- Thyroid hormones may play a role in regulating HDL cholesterol.
- Observed associations between HDL cholesterol and clinical chemistry tests are not always disease-driven.
- Despite specific correlations, the studied plasma constituents are not primary determinants of overall HDL cholesterol levels.
Abstract:
We examined data from the participants in the Lipid Research Clinics Program Prevalence Study for associations between high-density lipoprotein (HDL) cholesterol and clinical chemistry tests. There is a negative relationship between serum thyroxine and HDL cholesterol: men 20-69 years and women 20-44 years with low thyroxine levels have significantly higher HDL cholesterol than those with high thyroxine levels. Women 45-69 years with hyperglobulinemia (> 3.2 g/dl) have significantly lower HDL cholesterol levels than those with lower globulin levels. There is a weak negative association between HDL cholesterol and serum uric acid in men 20-44 years and a stronger association in women. A weak negative association between HDL cholesterol and plasma glucose is present only in men 20-44 years and women 45-69 years. Subjects with high serum bilirubin or serum aspartate aminotransferase (AST, SGOT) values have higher HDL cholesterol levels that are statistically significant in men 20-69 years and women 20-44 years (bilirubin) and men 45-69 years and women 45-69 years (AST). There is a negative association between alkaline phosphatase and HDL cholesterol in women and young men. These results suggest that thyroid hormones may be involved in the regulation of HDL cholesterol, and that there are associations between HDL cholesterol and the clinical chemistry tests that are not necessarily explained by disease. However, in the whole population, the plasma constituents measured as clinical chemistry tests, or the mechanisms that regulate their levels, are not important determinants of plasma HDL cholesterol levels.