Table 1.

Characteristics of the childhood cancer cohort and the gender-matched and age-matched reference cohort

	Cases		References
	n	%	n	%
	1386	100.0	13 860	100.0
Sex
Girls	650	46.9	6500	46.9
Boys	736	53.1	7360	53.1
Age at diagnosis (index date), years
10–15	411	29.7	4110	29.7
5–9	360	26.0	3600	26.0
1–4	475	34.3	4750	34.3
0	140	10.1	1400	10.1
Type of cancer
Leukaemia	347	25.0	–	–
Lymphoma	170	12.3	–	–
CNS tumour	367	26.5	–	–
Bone tumour	59	4.3	–	–
Other solid tumour	443	32.0	–	–
Siblings
Yes	1044	75.3	10.329	74.5
No	276	19.9	2.870	20.7
Missing	66	4.8	661	4.8
Parental cohabitation status
Living with a partner	915	66.0	8.972	64.7
Living alone	393	28.4	4.136	29.8
Missing	78	5.6	752	5.4
Educational level
High (>15 years)	547	39.5	5.587	40.3
Medium (>10–15 years)	531	38.3	5.267	38.0
Low (<10 years)	211	15.2	2.091	15.1
Missing	97	7.0	915	6.6
Labour market affiliation
Employed	987	71.2	9.876	71.3
Mixed	191	13.8	1.991	14.4
Unemployed	130	9.4	1.241	9.0
Missing	78	5.6	752	5.4
Household income
High	330	23.8	3.294	23.8
Medium	655	47.3	6.601	47.6
Low	334	24.1	3.297	23.8
Missing	67	4.8	668	4.8
GP consultation within 3 months before diagnosis/index date	1044	75.3	5220	37.7
Diagnostic test performed within 3 months before diagnosis/index date	407	29.4	960	6.9

CNS, central nervous system; GP, general practitioner.