Important numbers

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Blood Glucose Levels

In the UK, normal usage is Whole Blood, Millimoles/L

Situation

Plasma Glucose

Whole Blood glucose

Millimoles/L

Milligrams/dL

Millimoles/L

Milligrams/dL

Lower limit

5

90

4

70

Fasting

7

125

6

110

Post Prandial

11

200

10

180

Medium term average blood glucose levels are estimated by the "HbA1c" (Glycosylated Haemoglobin) test, which roughly speaking measures the amount of glucose "stuck" to red blood cells. This is measured as a percentage, and should be less than 7. Values of 6 or under are good; non-diabetics will have between 3.5 and 5.5. Although the relationship is not exact, 5.5% HbA1c is roughly equivalent to an average whole blood glucose of 6 mmol/L.

Blood Pressure

Pretty well everywhere, this is measured in millimetres of mercury (mmHg) and is expressed as the ratio of

Systolic to Diastolic pressure

written as, for example, 140/90, and spoken as “140 over 90”.

Normal level is below 140/90. 130/80 is a good target for diabetics.

The systolic number can be anything from 90 to 240, and diastolic from 60 to 140.

Cholesterol Levels

In the UK, normal usage is Millimoles/L


Millimoles/L

Milligrams/dL

Total Cholesterol (TC)

5.2 or less

200 or less

High Density Lipoproteins (HDL)

1.2 or more

50 or more

TC/HDL Ratio should be 4.5 or less.

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