Table 2.
Hazard ratio (HR) and 95% confidence interval (CI) of the association of meat and meat types, and risk of BC based on tertiles of meat and meat types
| Meat and meat types | Tertile 1 | Tertile 2 | Tertile 3 | P trend | |
|---|---|---|---|---|---|
| HR (95%CI)* | HR (95%CI) | HR (95%CI) | |||
| Total red meats and products | Participants | (856/171,991) | (1103/171,741) | (889/171,959) | – |
| (cases/non-cases) | |||||
| Person-years | 1,790,142 | 1,845,531 | 1,862,353 | – | |
| Crude | 1 (reference) | 1.25 (1.15, 1.36) | 1.13 (1.04, 1.23) | 0.007 | |
| Model 1a | 1 (reference) | 1.13 (1.04, 1.24) | 0.96 (0.87, 1.05) | 0.222 | |
| Model 2b | 1 (reference) | 1.12 (1.02, 1.23) | 0.94 (0.85, 1.03) | 0.085 | |
| Model 3c† | 1 (reference) | 1.08 (0.94, 1.23) | 1.01 (0.84, 1.21) | 0.248 | |
| Red meats | Participants | (445/148,483) | (577/148,350) | (613/148,316) | – |
| (cases/non-cases) | |||||
| Person year | 1,671,793 | 1,636,671 | 1,666,877 | – | |
| Crude | 1 (reference) | 1.18 (1.04, 1.38) | 1.13 (0.99, 1.29) | 0.079 | |
| Model 1a | 1 (reference) | 1.08 (0.95, 1.23) | 0.99 (0.86, 1.13) | 0.750 | |
| Model 2b | 1 (reference) | 1.09 (0.96, 1.24) | 1.02 (0.89, 1.17) | 0.868 | |
| Model 3c† | 1 (reference) | 1.06 (0.93, 1.20) | 1.03 (0.88, 1.21) | 0.721 | |
| Processed meats | Participants | (505/148,425) | (561/148,365) | (569/148,359) | – |
| (cases/non-cases) | |||||
| Person year | 1,665,703 | 1,658,865 | 1,650,773 | – | |
| Crude | 1 (reference) | 1.16 (1.04, 1.30) | 1.30 (1.16, 1.45) | < 0.001 | |
| Model 1a | 1 (reference) | 0.95 (0.84, 1.07) | 0.99 (0.88, 1.11) | 0.895 | |
| Model 2b | 1 (reference) | 0.94 (0.84, 1.06) | 0.98 (0.88, 1.11) | 0.822 | |
| Model 3c† | 1 (reference) | 0.89 (0.72, 1.10) | 0.95 (0.73, 1.24) | 0.304 | |
| Organ meats | Participants | (389/149,366) | (541/147,560) | (705/148,223) | – |
| (cases/non-cases) | |||||
| Person year | 1,658,709 | 1,676,021 | 1,640,611 | – | |
| Crude | 1 (reference) | 1.31 (1.15, 1.49) | 1.48 (1.29, 1.69) | < 0.001 | |
| Model 1a | 1 (reference) | 1.25 (1.09, 1.43) | 1.20 (1.05, 1.39) | 0.015 | |
| Model 2b | 1 (reference) | 1.21 (1.06, 1.39) | 1.18 (1.03, 1.36) | 0.032 | |
| Model 3c† | 1 (reference) | 1.22 (1.06, 1.40) | 1.21 (1.05, 1.38) | 0.014 | |
| Poultry | Participants | (1022/171,827) | (977/171,867) | (849/171,997) | – |
| (cases/non-cases) | |||||
| Person year | 1,891,568 | 1,858,982 | 1,747,476 | – | |
| Crude | 1 (reference) | 0.77 (0.71, 0.84) | 0.62 (0.57, 0.68) | < 0.001 | |
| Model 1a | 1 (reference) | 0.82 (0.75, 0.89) | 0.73 (0.67, 0.81) | < 0.001 | |
| Model 2b | 1 (reference) | 0.81 (0.74, 0.89) | 0.71 (0.65, 0.78) | < 0.001 | |
| Model 3c‡ | 1 (reference) | 0.91 (0.81, 1.04) | 0.98 (0.84, 1.12) | 0.54 | |
| Total fish and fish products | Participants | (252/61,489) | (473/61,269) | (812/60,929) | – |
| (cases/non-cases) | |||||
| Person year | 666,381.6 | 603,304.3 | 497,419.5 | – | |
| Crude | 1 (reference) | 0.73 (0.61, 0.85) | 0.54 (0.47, 0.63) | < 0.001 | |
| Model 1a | 1 (reference) | 0.85 (0.73, 0.96) | 0.88 (0.75, 1.03) | 0.257 | |
| Model 2b | 1 (reference) | 0.85 (0.73, 1.00) | 0.84 (0.72, 1.00) | 0.080 | |
| Model 3c‡ | 1 (reference) | 0.92 (0.76, 1.11) | 0.89 (0.63, 1.25) | 0.369 |
*HR hazard ratio, CI confidence interval
aAdjusted for age, sex, smoking status and total energy intake
bAdjusted for model 1 + vegetables and fruits intakes
cAdjusted for †model 2 + poultry and fish intake ‡model 2 + red meat intake