Table 3:

The incidence rate ratio for intracranial tumour, leukemia or lymphomas according to computed tomography exposure status

No. of CT scansNo. of patients*No. of controlsPerson-yearsIncidence rate ratio (95% CI)
0770677 024462 594.251.00
1–384100510 569.710.48 (0.38–0.59)
≥ 41728443.272.30 (1.43–3.71)
  • Note: CI = confidence interval, CT = computed tomography.

  • * Patients with intracranial tumour, leukemia, non-Hodgkin lymphoma and Hodgkin lymphoma.