Study ID | Risk factor | Definition | Univariate OR (95% CI) | Bivariate OR (95% CI) | Multivariable OR (95% CI) |
---|---|---|---|---|---|
Zulian, 2002 [13] | Seasonality | Autumn | 0.85a,b | NR | NR |
Summer | 1.00a,b | NR | NR | ||
Winter | 1.39a,b | NR | NR | ||
Spring | 0.96a,b | NR | NR | ||
Cole, 2013 [14] | Allergy | “Allergy” in clinical notes | NR | 2.14 (1.08–4.27)c | NR |
“Allergic” in clinical notes | NR | 2.68 (1.34–5.55)c | NR | ||
Any allergy medication | NR | 2.92 (1.47–5.91)c | 2.54 (1.22–5.4)d | ||
Sengler, 2018 [15] | Vitamin D | 1 ng/mL increase in 25(OH) D level > 22.1 ng/mL | NR | NR | 0.95 (0.91–0.99)e,f,g |