Table 1.

Socio-demographic and confounding factors

	Cases	Controls	Cases (mean)	Controls (mean)
Age			1.7	1.6
Children’s gender
Male	77	71
Female	51	57
Mother’s age at pregnancy			29.6	29.2
Father’s age at pregnancy			32.7	32.3
Mother’s educational level
None	7	8
Primary school	31	30
Incomplete secondary	18	16
Complete secondary	10	15
Incomplete college	6	5
Complete college	28	26
Father’s educational level
None	12	9
Primary school	39	42
Incomplete secondary	8	8
Complete secondary	14	15
Incomplete college	10	7
Complete college	17	19
Net Income/month (€)
<800	13	16
800–1500	34	30
1500–2500	43	46
2500–3500	15	18
>3500	13	12
Familial/hereditary cancer syndrome	4	3
Transplacental ionising radiation	10 (7.8%)	5 (3.9%)
Year of birth
Mother			1971 (58–85) Median: 1972	1972 (57–83) Median: 1973
Father			1968 (42–80) Median: 1969	1969 (45–78) Median: 1969

There were no significant differences in any of the variables.