Change in Total PSA Assay

On 6th May Pathlab will be changing the method for Total PSA testing. This change is necessary due to an upgrade of the analysers used to perform testing.

PSA results will decrease by approximately 10% from this date. This change will bring the PSA results we report closer to those of other laboratories in New Zealand.

A comment will be appended to all reports using the new method of testing, for a period of 12 months to alert GPs and Specialists to the change in results.

Below is a graph showing the difference between the ‘Old’ and ‘New’ assays:

Comment to be reported with new assay results:

“Please note that from 6th May 2024, PSA results will be approximately 10% lower than prior to 6th May 2024”