Additional file 1 of Serum antioxidant vitamins and respiratory morbidity and mortality: a pooled analysis

Additional file 1: Figure S1. Flow chart for participants. Table S1. Interactions for the associations between serum vitamins and respiratory morbidity and mortality: P-values for effect modification by vitamin supplement use and smoking. Table S2. Associations between lower serum antioxidant vitamins and respiratory morbidity and mortality by use of vitamin supplements [NHANES III (1988–1994) and continuous NHANES (1999–2006)]. Table S3. Associations between lower serum antioxidant vitamins and respiratory morbidity and mortality by smoking status [NHANES III (1988–1994) and continuous NHANES (1999-2006)]. Table S4. Cohort specific estimates in models with significant heterogeneity. Table S5. Association of vitamin C deficiency and vitamin D (25-OHD) insufficiency with respiratory morbidity and mortality [NHANES III (1988–1994) and continuous NHANES (1999–2006)].