Table 5 Association between quintile of dietary pattern scores and breast cancer risk overall and by attained age during follow-up

From: Dietary patterns and risk of breast cancer

  

Overall

By attained age during follow-up

    

⩽55 years

>55 years

 

Dietary pattern

Quintiles

No. of cases

HR (95% CI)

No. of cases

HR (95% CI)

No. of cases

HR (95% CI)

P -value a

Vegetable

1

147

Reference

30

Reference

117

Reference

0.66

 

2

154

0.97 (0.77, 1.22)

42

1.11 (0.69, 1.79)

112

0.93 (0.71, 1.21)

 
 

3

169

1.02 (0.81, 1.30)

39

1.07 (0.66, 1.74)

130

1.01 (0.77, 1.32)

 
 

4

185

1.10 (0.87, 1.40)

33

0.97 (0.58, 1.62)

152

1.13 (0.87, 1.48)

 
 

5

160

0.98 (0.76, 1.28)

36

1.23 (0.74, 2.05)

124

0.93 (0.69, 1.24)

 
 

P-trend

 

0.97

 

0.72

 

0.84

 

Fruit and salad

1

174

Reference

47

Reference

127

Reference

0.47

 

2

189

1.04 (0.84, 1.28)

41

0.88 (0.58, 1.34)

148

1.10 (0.86, 1.40)

 
 

3

158

0.87 (0.69, 1.08)

32

0.73 (0.46, 1.14)

126

0.91 (0.71, 1.18)

 
 

4

156

0.88 (0.70, 1.10)

33

0.73 (0.46, 1.15)

123

0.93 (0.72, 1.21)

 
 

5

138

0.81 (0.63, 1.03)

27

0.66 (0.40, 1.07)

111

0.86 (0.65, 1.13)

 
 

P-trend

 

0.03

 

0.10

 

0.11

 

Traditional Australian

1

116

Reference

21

Reference

95

Reference

0.10

 

2

163

1.34 (1.03, 1.76)

37

1.13 (0.65, 1.97)

126

1.41 (1.05, 1.91)

 
 

3

162

1.27 (0.94, 1.71)

41

1.28 (0.73, 2.22)

121

1.24 (0.89, 1.73)

 
 

4

202

1.54 (1.14, 2.09)

48

1.81 (1.05, 3.13)

154

1.44 (1.03, 2.01)

 
 

5

172

1.25 (0.90, 1.74)

33

1.58 (0.87, 2.85)

139

1.17 (0.82, 1.66)

 
 

P-trend

 

0.24

 

0.04

 

0.64

 

Meat

1

162

Reference

25

Reference

137

Reference

0.16

 

2

161

1.00 (0.80, 1.25)

30

1.08 (0.63, 1.85)

131

1.00 (0.78, 1.27)

 
 

3

168

1.07 (0.85, 1.34)

43

1.43 (0.86, 2.37)

125

1.00 (0.78, 1.29)

 
 

4

170

1.12 (0.88, 1.41)

38

1.23 (0.73, 2.07)

132

1.11 (0.86, 1.44)

 
 

5

154

1.12 (0.85, 1.46)

44

1.50 (0.88, 2.55)

110

1.03 (0.77, 1.38)

 
 

P-trend

 

0.45

 

0.11

 

0.93

 
  1. Abbreviations: BMI=body mass index; 95% CI=confidence interval; HR=hazard ratio; HRT=hormone replacement therapy.
  2. Estimates from the model including four factor scores, adjusted for country of birth, age at menarche, parity, duration of lactation, oral contraceptive use, HRT use, menopausal status at baseline, physical activity, alcohol, smoking, level of education, total energy intake and BMI.
  3. aTest for homogeneity by attained age at follow-up.
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