Daily intake of nutrients in cases and controls and odds ratio (OR) for symptomatic asthma per quintiles increase in consumption
| Nutrient | Median (IQR) daily intake | Adjusted*OR (CI) per quintile increase in intake | ||||
|---|---|---|---|---|---|---|
| Cases | Controls | All cases | p value | Symptomatic cases | p value | |
| OR (CI), OR and 95% confidence interval for diagnosed and symptomatic asthma per quartile increase in consumption of each nutrient (linear model). | ||||||
| *Matched analysis adjusted for pack years smoked, social class, BMI, increasing level of physical activity and level of education. | ||||||
| †p⩽0.05, ‡p<0.001, difference in daily intake between cases and controls. | ||||||
| Vitamin C (mg) | 78.4 (56.0) | 85.0 (56.4) | 0.89 (0.81 to 0.97) | 0.007 | 0.84 (0.75 to 0.94) | 0.003 |
| Vitamin E (mg) | 6.7 (3.9) | 6.7 (3.3) | 0.96 (0.87 to 1.05) | 0.39 | 0.89 (0.79 to 1.00) | 0.51 |
| Folate (μg) | 250.0 (102.7)† | 263.3 (100.1)† | 0.89 (0 .81 to 0.98) | 0.01 | 0.84 (0.74 to 0.94) | 0.004 |
| Niacin (mg) | 1.8 (1.6) | 1.8 (1.6) | 1.07 (0.97 to 1.18) | 0.17 | 1.06 (0.94 to 1.20) | 0.35 |
| Riboflavin (mg) | 1.7 (0.7) | 1.7 (0.8) | 0.93 (0.84 to 1.01) | 0.10 | 0.87 (0.77 to 0.98) | 0.03 |
| Carotene (mg) | 1.8 (1.6) | 1.8 (1.6) | 0.95 (0.87 to 1.04) | 0.26 | 0.89 (0.79 to 1.00) | 0.05 |
| Calcium (mg) | 776.0 (326.8) | 825.4 (333.0) | 0.88 (0.80 to 0.97) | 0.01 | 0.84 (0.74 to 0.95) | 0.006 |
| Copper (mg) | 1.0 (0.4) | 1.1 (0.4) | 0.93 (0.84 to 1.02) | 0.12 | 0.88 (0.77 to 0.99) | 0.04 |
| Selenium (μg) | 51.7 (26.5) | 51.3 (25.4) | 0.99 (0.89 to 1.09) | 0.72 | 1.02 (0.90 to 1.15) | 0.76 |
| Magnesium (mg) | 275.1 (93.4) | 281.4 (97.4) | 0.94 (0.85 to 1.04) | 0.22 | 0.89 (0.78 to 1.01) | 0.07 |
| Manganese (mg) | 3.4 (1.6)‡ | 3.6 (1.4)‡ | 0.83 (0.76 to 0.91) | ⩽0.001 | 0.83 (0.73 to 0.93) | 0.002 |
| Zinc (mg) | 7.8 (3.0) | 7.8 (2.7) | 1.00 (0.91 to 1.11) | 0.94 | 0.98 (0.86 to 1.12) | 0.78 |