Table 1.

Maternal Variables by Daughters' Breast Cancer Status

Maternal Variables	Controls (n = 315)			Cases (n = 103)
	Percentile			Percentile
	25th	50th	75th	25th	50th	75th
Age, y	22	26	30	23	27	31
o,p′-DDT, ng/mL	0.27	0.46	0.78	0.32	0.52	1.06
p,p′-DDT, ng/mL	8.38	12.98	18.57	9.47	13.18	20.11
p,p′-DDE, ng/mL	29.29	42.81	57.56	30.91	43.13	58.08
Cholesterol, mg/dL	182	222	278	188	227	283
Triglycerides, mg/dL	139	183	227	136	182	227

	Percent	n	Percent	n
History of breast cancera	4.44	14	20.39	21
Primipara	29.84	94	26.21	27
African-American	25.08	79	23.30	24
Overweight (BMI ≥ 25 kg/m2)	25.08	79	17.48	18
Breast-fed her daughter	26.03	82	31.07	32

Abbreviation: BMI, body mass index.

^aP < .0001 for difference between controls and cases.