Advancing Parental Age and Risk of Solid Tumors in Children: A Case-Control Study in Peru

Table 5

Effect of birth order in childhood solid cancers development.

Birth order	N	OR unadjusted	CI 95%	OR adjusted	CI 95%
Trend	310	p-value=0.0010		p-value=0.0015
1		1		1
2		0.88	0.64-1.23	0.87	0-62-1.21
3		0.62	0.41-0.95	0.63	0.41-0.94
4		0.60	0.32-0.81	0.58	0.28-0.78
>=5		0.19	0.05-0.66	0.20	0.06-0.65

Adjusted by maternal age.