Data Source and Methodology
All calculations are based on the Friedewald Equation as detailed in the original publication by Friedewald et al., published in 1972.
The Formula Explained
\( \text{LDL} = \text{Total Cholesterol} - \text{HDL} - \left(\frac{\text{Triglycerides}}{5}\right) \)
Glossary of Terms
- Total Cholesterol: The overall level of cholesterol in your blood.
- HDL Cholesterol: High-density lipoprotein, often referred to as 'good' cholesterol.
- Triglycerides: A type of fat found in your blood.
- LDL Cholesterol: Low-density lipoprotein, often referred to as 'bad' cholesterol.
How It Works: A Step-by-Step Example
Suppose a patient has a Total Cholesterol of 200 mg/dL, HDL of 50 mg/dL, and Triglycerides of 150 mg/dL. Applying the formula:
LDL = 200 - 50 - (150 / 5) = 120 mg/dL
Frequently Asked Questions (FAQ)
How is LDL cholesterol calculated?
LDL cholesterol is calculated using the Friedewald Equation: LDL = Total Cholesterol - HDL - (Triglycerides/5).
What are the normal levels of LDL cholesterol?
Normal LDL levels are generally considered to be less than 100 mg/dL.
Why is LDL cholesterol called 'bad' cholesterol?
LDL cholesterol is called 'bad' because high levels can lead to plaque buildup in arteries and result in heart disease.
Can this calculator be used for everyone?
This calculator is not suitable for patients with triglycerides levels above 400 mg/dL.
How often should I check my cholesterol levels?
It's recommended to check your cholesterol levels once every 4-6 years for adults over 20.