Demand for colonoscopies could put the national bowel screening programme at risk if participants were given full test results, the National Screening Advisory Committee says.

Documents released under the Official Information Act show the committee has backed off ethical concerns it raised in 2015.

Then, it expressed ”substantial” concerns about plans to report only initial faecal blood results to general practitioners as either positive or negative, according to the national programme’s test threshold.

Its concern arose because the test threshold to trigger referral to a colonoscopy in the national programme is less sensitive than that used for the Waitemata District Health Board pilot programme.*

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