Fig. 1

Change in fasting blood glucose (mg/dL)^a and hemoglobin A1c (HbA1c, %)^a levels per unit increment of air pollutants in the diabetic group. ^aAdjusted for sex, 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. a Changes in fasting blood glucose (FBG) levels at a moving average of 0–6 days for PM₁₀ and PM_2.5, and 0–7 days for NO₂. b Changes in HbA1c level at a moving average of 0–60 days for each pollutant