Additional file 1 of Association of serum vitamin C levels with Asthma in adults: results of NHANES 2003–2006 and mendelian randomization study

Supplementary Material 1: Supplementary Table 1. Genetic instruments for serum vitamin C and their associations with asthma from UK Biobank and FinnGen. Supplementary Table 2. Sensitivity analysis of mendelian randomization. Supplementary Figure 1. Forest plot of SNPs associated with serum vitamin C and their risk of adult asthma. Supplementary Figure 2. Scatter plot of SNPs associated with serum vitamin C and their risk of adult asthma. Supplementary Figure 3. Leave-one-out of SNPs associated with serum vitamin C and their risk of asthma. Supplementary Figure 4. Funnel plot of SNPs associated with serum vitamin C and their risk of asthma