Table 2.
Baseline characteristics by levels of baseline fish intake (N = 20,167).
| < 1/wk | 1/wk | 2 – 4/wk | ≥ 5 wk | P 1 | |
|---|---|---|---|---|---|
| N | 4143 | 5093 | 8711 | 2220 | |
| Fish intake (servings/day) | 0.10 | 0.22 | 0.41 | 0.97 | |
| Age (years) 2 | 53.7 (9.83) | 53.3 (9.37) | 53.6 (9.23) | 53.3 (8.99) | 0.28 |
| Height (m) 2 | 1.78 (0.07) | 1.79 (0.07) | 1.78 (0.07) | 1.78 (0.07) | 0.81 |
| BMI (kg/m2) 2 | 24.7 (2.81) | 24.8 (2.74) | 24.8 (2.77) | 24.7 (2.78) | 0.50 |
| Skim or low fat milk (servings/day) 2 | 0.43 (0.57) | 0.40 (0.53) | 0.42 (0.54) | 0.45 (0.55) | 0.24 |
| Whole milk (servings/day) 2 | 0.21 (0.42) | 0.19 (0.39) | 0.17 (0.36) | 0.14 (0.33) | <0.001 |
| Meat intake (servings/day) 2 | 0.72 (0.47) | 0.73 (0.43) | 0.68 (0.42) | 0.61 (0.48) | <0.001 |
| Tomato and tomato juice (servings/day) 2 | 0.53 (0.44) | 0.56 (0.42) | 0.64 (0.44) | 0.72 (0.49) | <0.001 |
| Alcohol (drinks/day) 2 | 0.42 (0.46) | 0.51 (0.47) | 0.53 (0.45) | 0.51 (0.44) | <0.001 |
| White/Caucasian, % | 82.7 | 84.9 | 86.8 | 85.3 | <0.001 |
| Current smoker, % | 12.4 | 12.1 | 10.3 | 8.1 | <0.001 |
| Current multivitamin use, % | 18.1 | 18.9 | 20.1 | 23.3 | <0.001 |
| Current vitamin E supplement use, % | 4.3 | 4.0 | 5.5 | 7.1 | <0.001 |
| Vigorous exercise twice per week or more, % | 49.7 | 52.0 | 55.5 | 59.9 | <0.001 |
| Randomization group, % | 0.37 | ||||
| Placebo alone | 24.7 | 24.9 | 24.9 | 25.4 | |
| Aspirin alone | 24.5 | 25.1 | 24.8 | 25.9 | |
| Beta-carotene alone | 26.3 | 25.5 | 24.5 | 25.0 | |
| Aspirin and beta-carotene | 24.5 | 24.6 | 25.8 | 23.7 |
1
For continuous variables, from a linear regression model where fish intake (with the median intake in each category modeled as a continuous variable) was the explanatory variable. For categorical variables, from the Chi-square test.
2
Values are presented as mean (standard deviation)