Table 3

Rate ratios for breast cancer according to the three major dietary patternsa

Dietary patternsQuintilesP for trenda
1 (low load)2345 (high load)
Ages 40–76 yrs
 Healthy
  Age, Energy1.00 referent0.94 (0.79–1.12)0.96 (0.80–1.13)0.95 (0.80–1.13)0.93 (0.78–1.12)0.56
  Multivariateb1.00 referent0.94 (0.79–1.12)0.96 (0.80–1.14)0.95 (0.79–1.14)0.92 (0.76–1.13)0.52
 Western
  Age, Energy1.00 referent1.01 (0.85–1.21)0.95 (0.79–1.14)1.05 (0.87–1.27)1.03 (0.84–1.28)0.68
  Multivariateb1.00 referent1.01 (0.85–1.21)0.94 (0.78–1.14)1.03 (0.85–1.25)1.00 (0.79–1.26)0.92
 Drinker
  Age, Energy1.00 referent1.05 (0.88–1.25)1.17 (0.99–1.39)1.25 (1.05–1.49)1.28 (1.07–1.53)0.001
  Multivariateb1.00 referent1.05 (0.88–1.25)1.17 (0.98–1.39)1.24 (1.04–1.48)1.27 (1.06–1.52)0.002
Ages 40–49 yrs (multivariateb; N cases = 420)
 Healthy1.00 referent0.87 (0.63–1.20)1.12 (0.83–1.53)0.86 (0.61–1.20)0.91 (0.63–1.31)0.68
 Western1.00 referent1.41 (1.02–1.97)1.06 (0.74–1.51)1.24 (0.86–1.78)1.08 (0.70–1.67)0.95
 Drinker1.00 referent1.04 (0.71–1.52)0.92 (0.63–1.34)1.10 (0.78–1.57)1.12 (0.79–1.58)0.35
Ages 50–76 yrs (multivariateb; N cases = 908)
 Healthy1.00 referent0.97 (0.79–1.19)0.86 (0.70–1.07)0.99 (0.79–1.23)0.91 (0.72–1.16)0.52
 Western1.00 referent0.89 (0.72–1.09)0.92 (0.74–1.14)0.97 (0.77–1.22)0.98 (0.74–1.28)0.89
 Drinker1.00 referent1.03 (0.85–1.25)1.25 (1.02–1.52)1.27 (1.03–1.56)1.31 (1.05–1.63)0.002
  • a All Ps are from two-sided tests.

  • b Multivariate adjustment included age (as a continuous variable), energy intake (as a continuous variable), BMI (as a continuous variable), and education (less than high school, high school, and university), family history (yes, no), parity (0, 1–4, 5+ children), and age at first birth (<35, 35+).