Overview
The Lung Cancer calculator uses the Lung Cancer eRAT to determine a patient’s risk of having lung cancer based on the most recent data received from the clinical system for that patient and additional data that may be added by the user.
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Abnormal spirometry is inferred if the patient’s latest recorded FEV1/FVC ratio is < 0.7 or their latest recorded FEV1/FVC percentage is < 70%. If neither of these values is supplied then abnormal spirometry is not inferred.
Raised platelets are inferred if the patient has a platelet count > 400.
In order to determine the smoking status of a patient the following logic is applied in order:
If the latest light/heavy or moderate smoking code is on the same date as the latest current smoker code then the patient is set as a light/heavy/moderate smoker.
If the smoking status is not determined and the date of the latest Smoking Status code matches the latest Current smoker code the patient is set as a moderate smoker.
If smoking status is still not determined and the latest Current Smoker is within the last 20 years, but there is a later Smoking status code the patient is set as an ex-smoker.
They are also set as an ex-smoker if they have an ex-smoker code within the previous 20 years.
Ex-smokers are considered to be non-smokers if they stopped smoking 20 years or more ago.
If a smoking status has still not been determined, but they do have a smoking status code the patient is set as a non-smoker, alternatively their smoking status is set as unknown.
Risk Scoring
A risk of greater than 5% is considered very high.HIGH (RED)
A risk score of between 2% and 5% inclusive is considered high.MODERATE (AMBER)
A score of less than 2% and below is considered low.LOW (NO COLOUR)