Table 4.

Relative Risk of Incident Breast Cancer, by Quintile of Dietary Approaches to Stop Hypertension Score, Nurses’ Health Study, 1980–2006

Type of Cancer	Quintile 1	Quintile 2	95% CI	Quintile 3	95% CI	Quintile 4	95% CI	Quintile 5	95% CI	P Trend
Total breast cancer
No. of cases	975	1,009		1,125		1,147		1,266
Age- and energy-adjusted analyses	1	0.92	0.84, 1.00	0.97	0.89, 1.06	0.97	0.89, 1.06	0.97	0.89, 1.05	0.71
Multivariate analysisa	1	0.90	0.82, 0.99	0.95	0.87, 1.04	0.95	0.87, 1.04	0.97	0.89, 1.06	0.98
Estrogen receptor-positive tumors
No. of cases	573	605		673		715		752
Age- and energy-adjusted analyses	1	0.94	0.84, 1.06	0.99	0.88, 1.11	1.03	0.92, 1.15	0.98	0.87, 1.09	0.87
Multivariate analysisa	1	0.91	0.81, 1.02	0.95	0.84, 1.06	0.98	0.88, 1.10	0.96	0.85, 1.08	0.89
Estrogen receptor-negative tumors
No. of cases	166	162		162		156		181
Age- and energy-adjusted analyses	1	0.87	0.70, 1.08	0.82	0.66, 1.02	0.80	0.64, 1.00	0.83	0.66, 1.02	0.03
Multivariate analysisa	1	0.85	0.68, 1.06	0.80	0.64, 1.00	0.77	0.61, 0.97	0.80	0.64, 1.01	0.02

Abbreviation: CI, confidence interval.

^aAdjusted for age, energy intake, multivitamin use, smoking, body mass index, height, weight at 18 years of age, weight change since 18 years of age, family history of breast cancer, benign breast disease, physical activity level, alcohol intake, and menopausal hormone use.