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Table 2 Frequency of annual CT referrals for children

From: Paediatric CT scan usage and referrals of children to computed tomography in Germany-a cross-sectional survey of medical practice and awareness of radiation related health risks among physicians

Frequency class N %
none 174 59.0
1-2 46 15.6
3-5 41 13.9
6-10 7 2.4
11-15 3 1.0
> 15 8 2.7
n. a.* 16 5.4
295 100.0
  1. * n.a., no answer