Table 2.

Associations between childhood leukaemia and birthweight

Reference	Number of cases	Disease	Direction of trend
58	1,323	All leukaemias	Positive
59	802	All leukaemias	Positive
60	72	All leukaemias	Positive
61	681	All leukaemias	Positive, but only less than 2 years of age
62	255	All leukaemias	No association
63	1,304	All leukaemias	No association
64	309	ALL & AML	Positive, but only less than 6 years of age
65	337	ALL	Positive
66	71	ALL	Positive, but only above 4 years of age
67 *	613	ALL	Positive
68 *	98	AML	No association
69	303	ALL & AML	Positive
70	1,687	All leukaemias	Positive, only studied children less than 2 years of age
71 *	828	ALL & AML	Positive
72 *	268	ALL	Positive, only studied children less than 5 years
73	65	ALL & AML	Positive
74	2,204	ALL & AML	Positive

ALL, acute lymphoblastic leukaemia; AML, acute myeloid leukaemia.

^*Studies in which high birth weight was defined as ≥ 4500g.