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The status of evidence for a pre-existing clinical condition of chronic lung disease, as represented by a code.


Data Element (this item)


This representation is based on the value domain for this data element, more information is available at " Clinical evidence status code N ".
Data Type Number
Format N
Maximum character length 1
Value Meaning Start Date End Date
Permissible Values 1 Objective evidence
2 No objective evidence


Guide for use:

Objective evidence is coded where the diagnosis is supported by current use of chronic lung disease pharmacological therapy (e.g. inhalers, theophylline, aminophylline, or steroids), or a forced expiratory volume in 1 second (FEV1) less than 80% predicted FEV1/forced vital capacity (FVC) less than 0.7 (post bronchodilator). Respiratory failure partial pressure of oxygen (PaO2) less than 60 mmHg (8kPa), or partial pressure of carbon dioxide (PaCO2) greater than 50 mmHg (6.7 kPa).


The diagnosis rests on the airflow limitation, which is not fully reversible. Consider treating as asthma if airflow limitation is substantially reversible. (The Thoracic Society of Australia & New Zealand and the Australian Lung Foundation, Chronic Obstructive Pulmonary Disease (COPD) Australian & New Zealand Management Guidelines and the COPD Handbook. Version 1, November 2002.)


Related content

Relation Count
Inclusion in Data Set Specifications 3
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