{"id":"ldl-hdl-ratio","name":"LDL / HDL Ratio","shortName":"LDL/HDL Ratio","aliases":["LDL/HDL","LDL-C/HDL-C Ratio","LDL/HDL Cholesterol Ratio","LDL/HDL Ratio (Calc)","LDL/HDL Ratio, Calculated","LDL:HDL Ratio","LDL to HDL Ratio","LDL Cholesterol/HDL Cholesterol Ratio"],"abbreviations":["LDL/HDL","LDL:HDL","LDL-C/HDL-C"],"loinc":[{"code":"11054-4","primary":true},{"code":"44915-7","primary":false}],"specimen":"calculated","units":[{"ucum":"{ratio}","display":"ratio"}],"referenceRanges":[{"population":"Men","low":null,"high":4.9,"unit":"{ratio}","unitDisplay":"ratio","note":"Quest prints sex-specific risk groups instead of a single normal interval. This limit is the top of Quest's 'average risk' group (2.29-4.90 for men), so the range covers its 'below average risk' and 'average risk' groups. Quest lists no age split for the ratio. It is a lab group, not the central 95% of healthy people, and other sources set lower targets (see the optimal range). US guidelines set no target for this ratio, and other labs use other cutoffs, so check the range on your own report.","sources":[{"title":"Lipid Panel with Ratios, Quest Diagnostics (reference ranges as listed by Fullscript)","url":"https://us.fullscript.com/labs/quest/lipid-panel-with-ratios","publisher":"Quest Diagnostics (via Fullscript)"}]},{"population":"Women","low":null,"high":4.12,"unit":"{ratio}","unitDisplay":"ratio","note":"Quest prints sex-specific risk groups instead of a single normal interval. This limit is the top of Quest's 'average risk' group (2.35-4.12 for women), so the range covers its 'below average risk' and 'average risk' groups. Quest lists no age split for the ratio. It is a lab group, not the central 95% of healthy people, and other sources set lower targets (see the optimal range). US guidelines set no target for this ratio, and other labs use other cutoffs, so check the range on your own report.","sources":[{"title":"Lipid Panel with Ratios, Quest Diagnostics (reference ranges as listed by Fullscript)","url":"https://us.fullscript.com/labs/quest/lipid-panel-with-ratios","publisher":"Quest Diagnostics (via Fullscript)"}]}],"review":{"status":"ai-draft","label":"AI-drafted. Awaiting verification","lastReviewed":"2026-10-03"},"summary":"Your LDL cholesterol divided by your HDL cholesterol. Some labs print it as one number that compares the 'bad' and 'good' cholesterol you carry.","url":"https://bloodtesttracker.com/markers/ldl-hdl-ratio","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}