Table 1.
Potential risk factors | Total red meat intake fifth | ||||
---|---|---|---|---|---|
Lowest fifth (n=15 763) | 2nd fifth (n=21 366) | 3rd fifth (n=15 929) | 4th fifth (n=18 196) | Highest fifth (n=17 549) | |
Mean (SD) age (years) | 36.6 (4.7) | 36.5 (4.6) | 36.5 (4.6) | 36.4 (4.6) | 36.2 (4.6) |
Mean (SD) total red meat intake (serving/day) | 0.2 (0.1) | 0.5 (0.1) | 0.7 (0.1) | 1.0 (0.1) | 1.6 (0.5) |
Mean (SD) body mass index (weight (kg)/(height (m)2) | 23.3 (4.4) | 24.2 (4.8) | 24.5 (5.1) | 24.9 (5.4) | 25.7 (6.0) |
Mean (SD) total energy intake (kJ) | 6266 (2057) | 6688 (1960) | 7265 (1977) | 7963 (1998) | 9271 (2186) |
Mean (SD) alcohol consumption (g/day) | 3.2 (5.7) | 3.2 (6.0) | 3.1 (6.1) | 3.1 (6.1) | 3.0 (6.4) |
Mean (SD) age at first birth (years) | 26.4 (4.6) | 26.1 (4.2) | 25.9 (4.1) | 25.7 (4.0) | 25.4 (4.0) |
Current smokers (%) | 9 | 11 | 12 | 13 | 15 |
Current oral contraceptive use (%) | 12 | 12 | 11 | 10 | 10 |
History of benign breast disease (%) | 35 | 33 | 34 | 32 | 31 |
Family history of breast cancer in mother or sisters (%) | 16 | 15 | 15 | 15 | 15 |
Parity ≥3 (%) | 12 | 19 | 22 | 24 | 26 |
Age at menarche <12 (%) | 25 | 24 | 24 | 24 | 25 |