Table 5. Association between quintile of dietary pattern scores and breast cancer risk overall and by attained age during follow-up.
|
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 | |||||
Abbreviations: BMI=body mass index; 95% CI=confidence interval; HR=hazard ratio; HRT=hormone replacement therapy.
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.
a
Test for homogeneity by attained age at follow-up.