Fig. 2

Associations between changes in fasting blood glucose (mg/dL)^a and HbA1c (%)^a levels per interquartile range increment of PM₁₀, PM_2.5, and NO₂ in diabetic male aged ≥65 years. ^*p < 0.05. ^aAdjusted for age, education level, smoking, alcohol consumption, physical activity, obesity, daily mean temperature, and humidity. PM₁₀, particulate matter < 10 μm; PM_2.5, particulate matter < 2.5 μm; NO₂, nitrogen dioxide; ppb, parts per billion. 0, date of blood test; 0–15, moving average from days 0 to 15; 0–30, moving average from days 0 to 30; 0–45, moving average from days 0 to 45; 0–60, moving average from days 0 to 60; 0–75, moving average from days 0 to 75; 0–90, moving average from days 0 to 90; 0–120, moving average from days 0 to 120; 0–150, moving average from days 0 to 150