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The person's diastolic blood pressure, measured in millimetres of mercury (mmHg).


Data Element (this item)


This representation is based on the value domain for this data element, more information is available at " Millimetres of mercury NN[N] ".
Data Type Number
Format NN[N]
Maximum character length 3
Value Meaning Start Date End Date
Supplementary Values 999 Not stated/inadequately described


Guide for use:

The diastolic pressure is recorded as phase V Korotkoff (disappearance of sound) however phase IV Korotkoff (muffling of sound) is used if the sound continues towards zero but does not cease.

If Blood pressure - diastolic is not collected or not able to be collected, code 999.


The National Heart Foundation Blood Pressure Advisory Committee's 'Guidelines for the Management of Hypertension - 1999' which are largely based on World Health Organization Recommendations. (Guidelines Subcommittee of the WHO-ISH: 1999 WHO-ISH guidelines for management of hypertension. J Hypertension 1999; 17:151-83).

Australian Bureau of Statistics 1998. National Nutrition Survey User's Guide 1995. Cat. No. 4801.0. Canberra: ABS. (p. 20).

National Diabetes Outcomes Quality Review Initiative (NDOQRIN) data dictionary.


The pressure head is the height difference a pressure can raise a fluid's equilibrium level above the surface subjected to pressure. (Blood pressure is usually measured as a head of Mercury, and this is the unit of measure nominated for this metadata item.)

The current (2002) definition of hypertension is based on the level of blood pressure above which treatment is recommended, and this depends on the presence of other risk factors, e.g. age, diabetes etc. (NHF 1999 Guide to Management of Hypertension).


'Guidelines for the Management of Hypertension - 1999' largely based on World Health Organization Recommendations. (Guidelines Subcommittee of the WHO) J Hypertension 1999; 17: 151-83.).

Diabetes Control and Complications Trial: DCCT New England Journal of Medicine, 329(14), September 30, 1993.

UKPDS 38 Tight blood pressure control and risk of macrovascular and microvascular complications in type 2 diabetes: UK Prospective Diabetes Study Group. British Medical Journal (1998); 317: 703-713.

This content Based on Australian Institute of Health and Welfare material. Attribution provided as required under the AIHW CC-BY licence.

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Relation Count
Inclusion in Data Set Specifications 10
Inclusion in Data Distributions 0
As a numerator in an Indicator 0
As a denominator in an Indicator 0
As a disaggregation in an Indicator 0