Fig. 4
From: Serum antioxidant vitamins and respiratory morbidity and mortality: a pooled analysis
Serum α-tocopherol and respiratory morbidity by smoking. Forest plots for the associations between lower serum log10- α-tocopherol vitamin E and respiratory mortality by smoking [NHANES III (1988–1994), continuous NHANES (1999–2006), and pooled estimates]. The models were adjusted for age, gender, race/ethnicity, income, educational attainment, use of any vitamin supplements in the previous month, cigarette smoking and exposure to cigarette smoke, pack-years of cigarette smoking, BMI, alcohol consumption, caloric intake, general health status, total serum cholesterol, and survey cycle (only continuous NHANES). Pinteraction for vitamin E*smoking < 0.01