True or false: HDL and total cholesterol can be sufficient to assess cardiovascular risk.

True or false: HDL and total cholesterol can be sufficient to assess cardiovascular risk.

• A. True
• B. False
• C. Not always
• D. Only with high triglycerides

Answer: (A)

Relying on lipid levels to gauge cardiovascular risk requires more than just HDL and total cholesterol. Total cholesterol sums all cholesterol in lipoproteins, and HDL is the protective fraction, but neither tells you directly how many atherogenic particles (mainly LDL and VLDL remnants) are present. LDL cholesterol is the primary lipid driver of atherosclerosis, and in many cases it is estimated using the Friedewald equation as LDL = total cholesterol minus HDL minus triglycerides divided by 5; this means you need triglyceride information to derive LDL. If triglycerides are elevated or not available, LDL cannot be accurately determined from total and HDL alone. Moreover, even with lipid data, an accurate cardiovascular risk assessment also depends on nonlipid factors such as age, sex, race, blood pressure, smoking status, and presence of diabetes. In practice, a comprehensive assessment uses LDL or non-HDL cholesterol, triglycerides, and these clinical risk factors rather than HDL and total cholesterol alone, so the statement that HDL and total cholesterol are sufficient is not accurate.

Relying on lipid levels to gauge cardiovascular risk requires more than just HDL and total cholesterol. Total cholesterol sums all cholesterol in lipoproteins, and HDL is the protective fraction, but neither tells you directly how many atherogenic particles (mainly LDL and VLDL remnants) are present. LDL cholesterol is the primary lipid driver of atherosclerosis, and in many cases it is estimated using the Friedewald equation as LDL = total cholesterol minus HDL minus triglycerides divided by 5; this means you need triglyceride information to derive LDL. If triglycerides are elevated or not available, LDL cannot be accurately determined from total and HDL alone. Moreover, even with lipid data, an accurate cardiovascular risk assessment also depends on nonlipid factors such as age, sex, race, blood pressure, smoking status, and presence of diabetes. In practice, a comprehensive assessment uses LDL or non-HDL cholesterol, triglycerides, and these clinical risk factors rather than HDL and total cholesterol alone, so the statement that HDL and total cholesterol are sufficient is not accurate.