Person—low-density lipoprotein cholesterol level (calculated), total millimoles per litre N[N].N
Identifying and definitional attributes | |
Metadata item type:![]() | Data Element |
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Short name:![]() | Cholesterol—LDL (calculated) |
METEOR identifier:![]() | 359262 |
Registration status:![]() |
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Definition:![]() | A person's calculated low-density lipoprotein cholesterol (LDL-C) in millimoles per litre. |
Data Element Concept: | Person—low-density lipoprotein cholesterol level |
Value domain attributes | ||||||||||||||||
Representational attributes | ||||||||||||||||
Representation class:![]() | Total | |||||||||||||||
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Data type:![]() | Number | |||||||||||||||
Format:![]() | N[N].N | |||||||||||||||
Maximum character length:![]() | 3 | |||||||||||||||
Supplementary values:![]() |
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Unit of measure:![]() | Millimole per litre (mmol/L) | |||||||||||||||
Data element attributes | ||||||||||||||||
Collection and usage attributes | ||||||||||||||||
Guide for use:![]() | Formula: LDL-C = (plasma total cholesterol) - (high density lipoprotein cholesterol) - (fasting plasma triglyceride divided by 2.2). | |||||||||||||||
Collection methods:![]() | The LDL-C is usually calculated from the Friedwald Equation (Friedwald et al. 1972), which depends on knowing the blood levels of the total cholesterol and HDL-C and the fasting level of the triglyceride. Note that the Friedwald equation becomes unreliable when the plasma triglyceride exceeds 4.5 mmol/L. Note also that while cholesterol levels are reliable for the first 24 hours after the onset of acute coronary syndromes, they may be unreliable for the subsequent 8 weeks after an event.
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Comments:![]() | High blood cholesterol is a key factor in heart, stroke and vascular disease, especially coronary heart disease (CHD). Poor nutrition can be a contributing factor to heart, stroke and vascular disease as a population's level of saturated fat intake is the prime determinant of its level of blood cholesterol. The majority of the cholesterol in plasma is transported as a component of LDL-C. Recent trials support a target LDL-C of <2.0 mmol/L for high risk patients with existing coronary heart disease. | |||||||||||||||
Source and reference attributes | ||||||||||||||||
Submitting organisation:![]() | Cardiovascular Data Working Group | |||||||||||||||
Origin:![]() | National Heart Foundation of Australia and the Cardiac Society of Australia and New Zealand, Lipid Management Guidelines - 2001, MJA 2001; 175: S57-S88. National Heart Foundation of Australia and the Cardiac Society of Australia and New Zealand, Position Statement on Lipid Management - 2005, Heart, Lung and Circulation 2005; 14: 275-291. | |||||||||||||||
Relational attributes | ||||||||||||||||
Related metadata references:![]() | Is formed using Health service event—fasting indicator, code N
Is formed using Person—cholesterol level (measured), total millimoles per litre N[N].N
Is formed using Person—high-density lipoprotein cholesterol level (measured), total millimoles per litre [N].NN
Supersedes Person—low-density lipoprotein cholesterol level (calculated), total millimoles per litre N[N].N
Is formed using Person—triglyceride level (measured), total millimoles per litre N[N].N
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Implementation in Data Set Specifications:![]() All attributes + |
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