Article Text

Download PDFPDF
Does radiation associated with diagnostic CT scans in children and young people increase their subsequent risk of developing cancer?

Statistics from

Request Permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.



Population-based cohort study, linking data from national Medicare and Cancer Database records.




10.9 million patients aged 0–19 years from 1985 to 2005. 681 211 patients had a Medicare-funded CT scan during the study period and were classed as exposed. Patients whose scans were in state-based tertiary hospitals (not Medicare funded) were not identifiable and were not moved to the exposed group.

3150 cancers were identified in patients who had a CT scan at least a year before the cancer was detected. Cancers detected within a year of the CT scan were not included to minimise the potential reverse causation of CT scans performed for cancer-related symptoms.

Risk factors

Time since exposure, year of exposure, age at exposure, sex, socioeconomic status, site of CT scan and …

View Full Text


  • Competing interests None.

  • Provenance and peer review Not commissioned; internally peer reviewed.