Female—hypertensive disorder during pregnancy indicator, yes/no/not stated/inadequately described code N

Identifying and definitional attributes

• Health, Recorded 15/06/2022

Value domain attributes

Representational attributes

Collection and usage attributes

CODE 9    Not stated/inadequately described

This code is not for use in primary data collections.

Data element attributes

Collection and usage attributes

CODE 1   Yes

To be reported if a female has a hypertensive disorder during this pregnancy, including where a female's hypertensive disorder is controlled through treatment during this pregnancy.

CODE 2   No

To be reported if a female does not have a hypertensive disorder during this pregnancy.

CODE 9   Not stated/inadequately described

To be recorded by data entry personnel (state/territory health authority) if the data field is left blank or is inadequately completed in the perinatal data collection form or extract. Clinicians should not record Code 9.

Based on Society of Obstetric Medicine of Australia and New Zealand (SOMANZ) Guideline for the Management of Hypertensive Disorders of Pregnancy (Lowe et al. 2014), normal pregnancy is characterised by a fall in blood pressure, detectable in the first trimester and usually reaching a nadir in the second trimester. Blood pressure rises towards pre-conception levels by term.

Hypertension in pregnancy is defined as:

1. Systolic blood pressure greater than or equal to 140 mmHg and/or

2. Diastolic blood pressure greater than or equal to 90 mmHg.

Measurements should be confirmed by repeated readings over several hours.

The diagnosis is preferably derived from and substantiated by clinical documentation which should be reviewed at the time of delivery. However this information may not be available in which case the patient may self-report to the clinician that they have been diagnosed with a hypertensive disorder.

Jurisdictions that record perinatal data using the ICD-10-AM should apply the following codes: O10, O11, O13, O14.0–O14.9, O15.0–O15.9 and O16.

Source and reference attributes

Independent Hospital Pricing Authority 2022. The International Statistical Classification of Diseases and Related Health Problems, 10th Revision, Australian Modification (ICD-10-AM), Twelfth Edition. Tabular List and Alphabetic Index. Darlinghurst, NSW.

Lowe SA, Bowyer L, Lust K, McMahon LP, Morton MR, North RA et al. 2014. Guideline for the management of hypertensive disorders of pregnancy. Society of Obstetric Medicine of Australia and New Zealand. Viewed 25 July 2022, https://ranzcog.edu.au/wp-content/uploads/2022/05/Guideline-for-the-Management-of-Hypertensive-Disorders-of-Pregnancy.pdf

Relational attributes