TY - JOUR T1 - Does radiation associated with diagnostic CT scans in children and young people increase their subsequent risk of developing cancer? JF - Archives of disease in childhood - Education & practice edition JO - Arch Dis Child Educ Pract Ed SP - 239 LP - 239 DO - 10.1136/archdischild-2013-305274 VL - 98 IS - 6 A2 - , Y1 - 2013/12/01 UR - http://ep.bmj.com/content/98/6/239.abstract N2 - Design Population-based cohort study, linking data from national Medicare and Cancer Database records. Setting Australia. Patients 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 … ER -