Table 4. Dietary intakes by median of PRAL in case and control groups.
| Variable | Case (RA) | Control (Healthy) | ||||
|---|---|---|---|---|---|---|
| PRAL < −7.64 | PRAL > −7.64 | p value* | PRAL < −7.64 | PRAL > −7.64 | p value* | |
| Energy (kcal/day) | 2,181.04 ± 688.50 | 2,221.20 ± 856.35 | 0.84 | 2,450.60 ± 1,029.00 | 2,306.00 ± 873.00 | 0.27 |
| Carbohydrate (g/day) | 343.17 ± 99.00 | 340.62 ± 149.01 | 0.94 | 398.10 ± 177.25 | 357.58 ± 135.22 | 0.06 |
| Protein (g/day) | 73.04 ± 26.91 | 78.25 ± 30.93 | 0.50 | 78.74 ± 38.81 | 80.76 ± 36.60 | 0.69 |
| Fat (g/day) | 64.08 ± 27.29 | 65.28 ± 25.50 | 0.86 | 67.74 ± 28.23 | 64.80 ± 29.22 | 0.45 |
| Calcium (mg/day) | 1,075.12 ± 423.20 | 1,156.08 ± 547.71 | 0.54 | 1,226.41 ± 652.12 | 1,201.94 ± 569.44 | 0.70 |
| Magnesium (mg/day) | 315.00 ± 109.64 | 265.13 ± 107.27 | 0.09 | 340.77 ± 158.73 | 273.13 ± 107.94 | 0.001 |
| Phosphorus (mg/day) | 1,058.55 ± 383.80 | 1,028.51 ± 419.35 | 0.70 | 1,123.45 ± 515.27 | 1,062.44 ± 467.06 | 0.36 |
| Potassium (mg/day) | 2,374.40 ± 1,232.80 | 2,469.70 ± 981.40 | 0.003 | 3,692.90 ± 1,634.50 | 2,493.50 ± 1,042.30 | 0.001 |
| Sodium (mg/day) | 4,138.90 ± 1,570.20 | 3,847.30 ± 1,469.30 | 0.40 | 4,519.40 ± 2,242.90 | 4,277.60 ± 2,025.90 | 0.40 |
| Cholesterol (mg/day) | 218.60 ± 126.40 | 231.28 ± 146.40 | 0.73 | 231.00 ± 143.56 | 242.86 ± 148.67 | 0.50 |
| Fiber (g/day) | 23.98 ± 8.44 | 19.38 ± 8.25 | 0.04 | 27.29 ± 14.48 | 19.45 ± 8.77 | 0.001 |
| Omega-3 (mg/day) | 0.03 ± 0.02 | 0.03 ± 0.02 | 0.57 | 0.03 ± 0.03 | 0.04 ± 0.03 | 0.03 |
| Red Meat (g/day) | 8.37 ± 9.86 | 13.97 ± 20.88 | 0.21 | 12.75 ± 18.37 | 12.03 ± 14.44 | 0.75 |
| Dairy (g/day) | 330.12 ± 292.93 | 336.14 ± 282.69 | 0.93 | 475.42 ± 486.00 | 359.72 ± 415.67 | 0.06 |
| Vegetable (g/day) | 107.62 ± 34.79 | 96.52 ± 35.49 | 0.24 | 120.38 ± 51.97 | 102.58 ± 44.62 | 0.007 |
| Fruit (g/day) | 140.11 ± 46.75 | 129.87 ± 48.87 | 0.43 | 158.64 ± 70.38 | 137.45 ± 61.29 | 0.02 |
PRAL, potential renal acid load; RA, rheumatoid arthritis.
*Calculated by t-test.