From: Protein, iron, and meat consumption and risk for rheumatoid arthritis: a prospective cohort study
Quintile | Median intake (servings/day) | Number of cases | Age-adjusted rate ratios (95% CI) | Multivariatea rate ratios (95% CI) | |
---|---|---|---|---|---|
Total meat (red meat and poultry) | 1 | 0.82 | 118 | 1.00 | 1.00 |
2 | 1.20 | 107 | 0.91 (0.70–1.18) | 0.89 (0.68–1.17) | |
3 | 1.52 | 127 | 1.08 (0.84–1.39) | 1.09 (0.84–1.42) | |
4 | 1.89 | 94 | 0.79 (0.60–1.04) | 0.81 (0.61–1.08) | |
5 | 2.54 | 100 | 0.86 (0.65–1.12) | 0.91 (0.67–1.23) | |
P for trend = 0.18b | P for trend = 0.55b | ||||
Red meat | 1 | 0.53 | 123 | 1.00 | 1.00 |
2 | 0.89 | 112 | 0.92 (0.71–1.18) | 0.92 (0.71–1.19) | |
3 | 1.21 | 115 | 0.92 (0.72–1.19) | 0.95 (0.73–1.23) | |
4 | 1.57 | 98 | 0.80 (0.61–1.04) | 0.82 (0.62–1.09) | |
5 | 2.22 | 98 | 0.80 (0.62–1.05) | 0.86 (0.64–1.16) | |
P for trend = 0.09b | P for trend = 0.35b | ||||
Poultry | 1 | 0.09 | 76 | 1.00 | 1.00 |
2 | 0.14 | 134 | 0.92 (0.69–1.22) | 0.91 (0.69–1.21) | |
3 | 0.22 | 89 | 0.84 (0.62–1.14) | 0.86 (0.63–1.17) | |
4 | 0.33 | 97 | 0.89 (0.66–1.21) | 0.94 (0.69–1.28) | |
5 | 0.48 | 150 | 1.16 (0.88–1.54) | 1.17 (0.88–1.55) | |
P for trend = 0.06b | P for trend = 0.06b | ||||
Fish | 1 | 0.07 | 106 | 1.00 | 1.00 |
2 | 0.13 | 125 | 0.94 (0.73–1.22) | 0.94 (0.73–1.23) | |
3 | 0.17 | 92 | 1.02 (0.76–1.37) | 1.09 (0.81–1.47) | |
4 | 0.25 | 114 | 0.95 (0.71–1.26) | 1.06 (0.80–1.40) | |
5 | 0.44 | 109 | 0.99 (0.75–1.30) | 0.96 (0.72–1.26) | |
P for trend = 0.90b | P for trend = 0.88b |