Table 1. Age-standardised distribution of demographic characteristics among 71 751 women according to birthweight throughout follow-up 1976–2004 (N=1 678 702 person-years).

	Birthweight (g)
Demographic characteristics	<2500	2500–<3182	3182–<3863	⩾3863
Family history of endometrial cancer (%)	3.4	2.9	3.0	3.7
Premature birth (%)	35.6	2.9	0.7	0.3
First born (%)	40.6	39.2	37.9	29.1
Breast fed (%)	42.4	52.0	57.0	62.3
Age at menarche (mean) (years)	12.4	12.4	12.4	12.5
BMI at age 18 (Mean) (kg m−2)	21.1	21.0	21.5	21.9
Height (Mean) (cm)	162	163	165	166
Nulliparous (%)	7.0	6.9	6.4	7.5
Mean number of children among parous women	3.2	3.2	3.2	3.2
Premenopausal (%)	35.3	35.9	36.2	35.7
Ever smoked (%)	54.3	54.8	56.1	58.9
Current BMI (Mean) (kg m−2)	25.3	25.0	25.5	25.8