Table 2.
Soy Protein Intake at 6 Months Post-Cancer Diagnosis by Demographic Characteristics, Clinical Predictors and Selected Lifestyle Factors, the Shanghai Breast Cancer Survival Study
| Soy Protein Intake (quartiles, g/day) | |||||
|---|---|---|---|---|---|
| Q1(=<5.31)N=1254 | Q2(5.32-9.45)N=1262 | Q3(9.46-15.31)N=1256 | Q4(>15.31)N=1260 | P | |
| Age at diagnosis (x̄±SD, year) | 54.2±10.4 | 53.4±10.0 | 53.3±9.9 | 52.9±9.6 | 0.15* |
| Crucifer intake (x̄±SD, g/day) | 59.3±42.3 | 67.2±44.6 | 75.6±57.0 | 91.7±59.8 | <0.01* |
| Meat intake (x̄±SD, g/day) | 362.6±180.9 | 362.4±183.4 | 353.6±176.4 | 366.8±191.6 | 0.52* |
| Red meat intake (x̄±SD, g/day) | 215.0±153.4 | 198.1±156.4 | 186.9±161.2 | 176.2±159.2 | <0.01* |
| White meat intake (x̄±SD, g/day) | 88.6±86.6 | 88.7±88.4 | 81.9±79.5 | 91.4±93.3 | 0.32* |
| Fish intake (x̄±SD, g/day) | 48.8±59.9 | 62.0±69.1 | 68.8±72.0 | 78.8±77.0 | <0.01* |
| BMI (x̄±SD) | 23.8±3.5 | 24.0±3.3 | 24.0±3.3 | 24.5±3.5 | <0.01* |
| Number of pregnancies (x̄±SD) | 1.5±1.4 | 2.5±1.4 | 2.5±1.4 | 2.4±1.4 | 0.47* |
| Education level (%) | |||||
| None | 5.0 | 3.1 | 3.7 | 3.3 | |
| Primary school | 9.1 | 7.5 | 7.5 | 7.4 | |
| Middle or high school | 70.2 | 73.4 | 72.4 | 73.4 | |
| College and above | 15.6 | 16.0 | 16.4 | 15.9 | 0.21 |
| Income (%)** | |||||
| <700 | 28.1 | 27.7 | 27.6 | 28.1 | |
| 700-999 | 30.7 | 30.4 | 30.2 | 26.8 | |
| 1000-1999 | 30.3 | 28.9 | 30.4 | 33.0 | |
| >2000 | 10.9 | 13.1 | 11.8 | 12.1 | 0.32 |
| Post-menopausal (%) | 52.6 | 51.4 | 49.4 | 50.9 | 0.45 |
| Tamoxifen user (%) | 53.0 | 52.7 | 53.3 | 49.5 | 0.20 |
| ER status (%) | |||||
| Negative | 33.8 | 35.3 | 35.4 | 36.3 | |
| Positive | 64.4 | 63.2 | 63.2 | 62.0 | |
| Missing | 1.8 | 1.5 | 1.4 | 1.7 | 0.85 |
| PR status (%) | |||||
| Negative | 40.1 | 40.9 | 39.3 | 42.1 | |
| Positive | 57.9 | 57.4 | 59.0 | 55.6 | |
| Missing | 2.0 | 1.7 | 1.7 | 2.3 | 0.63 |
| TNM stage (%) | |||||
| 0-I | 37.2 | 37.5 | 35.4 | 35.7 | |
| IIA | 32.1 | 32.1 | 33.9 | 32.6 | |
| IIB+ | 15.2 | 16.4 | 18.5 | 16.4 | |
| III-IV | 11.1 | 9.7 | 8.2 | 10.1 | |
| Missing | 4.3 | 4.3 | 4.00 | 5.2 | 0.32 |
| Received chemotherapy (%) | 89.2 | 91.1 | 91.9 | 92.5 | 0.03 |
| Received radiotherapy (%) | 32.9 | 32.9 | 33.6 | 29.1 | 0.06 |
| Received radical mastectomy (%) | 90.7 | 92.2 | 93.6 | 93.8 | 0.01 |
| Family history of cancer (%)*** | 5.4 | 5.6 | 6.6 | 6.6 | 0.46 |
| HRT user (%) **** | 6.1 | 6.3 | 7.1 | 7.8 | 0.60 |
| Regular smoker (%) | 2.1 | 2.5 | 3.0 | 2.9 | 0.43 |
| Regular alcohol drinker (%) | 2.5 | 2.9 | 3.6 | 3.3 | 0.42 |
| Regular tea drinker (%) | 20.4 | 22.0 | 26.2 | 26.8 | <0.01 |
| Ginseng user (%) | 13.6 | 13.9 | 13.9 | 15.9 | 0.30 |
| Vitamin supplement use (%) | 25.6 | 28.8 | 28.7 | 34.3 | <0.01 |
| Regular physical activity (%) | 57.1 | 62.0 | 67.0 | 72.2 | <0.01 |
| Comorbidity score >=1 (%) | 21.2 | 19.6 | 18.6 | 20.2 | 0.42 |
*
Kruskal-Wallis test.
**
Unit: (RMB/person/month), currently 1USD=6.75RMB.
***
Family history of breast cancer or ovarian cancer.
****
Among post-menopausal women