TABLE 2.
Hazard ratios (95% confidence interval) from the Cox proportional hazards models by quintile for testing positive for severe acute respiratory syndrome coronavirus 2 as a function of plasma DHA% among those who were ever tested (n = 26,597)
| Plasma DHA% quintile (Q; min–max) | Unadjusted | Model 21 | Model 31 | Model 41 |
|---|---|---|---|---|
| Q1 (<1.49, reference) | 1 | 1 | 1 | 1 |
| Q2 (1.49, 1.79) | 0.94 (0.86, 1.03) | 0.96 (0.88, 1.05) | 0.99 (0.9, 1.08) | 0.99 (0.91, 1.09) |
| Q3 (1.80, 2.09) | 0.86 (0.78, 0.94)∗∗ | 0.90 (0.82, 0.99)∗ | 0.95 (0.86,1.04) | 0.97 (0.89,1.07) |
| Q4 (2.10, 2.50) | 0.73 (0.66, 0.8)∗∗∗ | 0.79 (0.72, 0.87)∗∗∗ | 0.85 (0.76, 0.93)∗∗ | 0.89 (0.80, 0.98)∗ |
| Q5 (>2.50) | 0.60 (0.55, 0.67)∗∗∗ | 0.68 (0.61, 0.76)∗∗∗ | 0.74 (0.67, 0.82)∗∗∗ | 0.79 (0.71, 0.89)∗∗∗ |
| Linear across quintiles | 0.89 (0.87, 0.9)∗∗∗ | 0.91 (0.89, 0.93)∗∗∗ | 0.94 (0.91, 0.96)∗∗∗ | 0.95 (0.92, 0.97)∗∗∗ |
| Linear trend per SD | 0.84 (0.81, 0.86)∗∗∗ | 0.87 (0.84, 0.9)∗∗∗ | 0.90 (0.87, 0.93)∗∗∗ | 0.92 (0.89, 0.96)∗∗∗ |
1
Model 2, adjusted for age at start of pandemic, sex, and race; model 3, including model 2 covariates + waist circumference; and model 4, including model 3 covariates + Townsend deprivation index, time since enrollment, smoking status, education, self-reported health, blood pressure medications, slow walking pace, fresh fruit, dried fruit, fresh vegetables, cooked vegetables, and grain fiber. ∗P < 0.05; ∗∗P < 0.01; ∗∗∗P < 0.001.