Table 5.

In utero radiation exposure and risk of rhabdomyosarcoma by trimester of exposure and histologic type of rhabdomyosarcoma

Histologic typeCases
Trimester of exposure, OR (95% CI)*
NExposedFirstSecondThirdAny
Embryonal2122910.5 (1.5-458.4)0.8 (0.2-3.3)2.1 (0.8-5.3)2.3 (1.2-4.4)
Other§107132.0 (0.1-118.0)2.0 (0.3-22.5)1.8 (0.4-8.5)1.9 (0.7-5.1)
  • * Unmatched analyses.

  • Includes one case for whom the trimester was unknown.

  • Exact OR (95% CI).

  • § Includes 66 alveolar cases.