Table 1 Number of cases and associated risks of primary tumours of the CNS, leukaemia, and lymphoma

		CNS cancer				Leukaemia				Lymphoma
	Cases	IR	ERR	95% CI ^a	Cases	IR	ERR	95% CI	Cases	IR	ERR	95% CI
All children	22	9.4			17	7.3			19	8.1
Unadjusted for predisposing factors^b			0.022	−0.016, 0.061			0.057	−0.079; 0.193			0.018	−0.068; 0.104
Adjusted for predisposing factors			0.012	−0.013, 0.037			0.047^c	−0.065; 0.159			0.008	−0.057; 0.073
Children without a predisposing factor	15	6.4	0.028	n.a.	12	5.2	0.187	n.a.	12	5.2	0.025	n.a.
Children with a predisposing factor	7	565.9	−0.005	n.a.	5	128.0	−0.012	n.a.	7	160.3	−0.005	n.a.

Abbreviations: CNS=central nervous system; CI=confidence interval; ERR=excess relative risk; IR=incidence rate; n.a.=not available.
The table provides the IR per 100 000 person-years, ERR related to cumulative organ dose (in mGy) from CT scans, for all children (without and with adjustment for predisposing factors), and separately for children with and without predisposing factors, with a 2-year exclusion period (based onJourny et al, 2015).
^aWald-based CI for the ERR.
^bFactors predisposing specifically to cancer at the site specified.
^cListed as 0.045 in Supplementary Table 6 of Journy et al.

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