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Table 2 The regression coefficient of exposure to air pollution with FBG, 1-h and 2-h post-load glucose concentrations in healthy pregnant women

From: Preconception air pollution exposure and glucose tolerance in healthy pregnant women in a middle-income country

Exposure Outcome   β-coefficient (95% CI) P_value
PM pollutants
 PM1 FBG Crude 0.80 (0.48, 1.11) <  0.01
Adjusteda 0.69 (0.38, 1.00) <  0.01
1-h post-load glucose Crude 0.54 (−0.44, 1.53) 0.27
Adjusted 0.41 (−0.56, 1.37) 0.41
2-h post-load glucose Crude 0.55 (− 0.29, 1.39) 0.19
Adjusted 2.86 (−2.14, 7.86) 0.26
 PM2.5 FBG Crude 0.71 (0.38, 1.00) <  0.01
Adjusted 0.61 (0.29, 0.93) <  0.01
1-h post-load glucose Crude 0.42 (−0.58, 1.4) 0.40
Adjusted 0.34 (−0.65, 1.33) 0.50
2-h post-load glucose Crude 0.41 (−0.45, 1.28) 0.34
Adjusted 3.13 (−1.98, 8.23) 0.23
 PM10 FBG Crude 0.22 (0.04, 0.40) <  0.01
Adjusted 0.19 (0.01, 0.37) 0.04
1-h post-load glucose Crude 0.11 (−0.43, 0.66) 0.68
Adjusted 0.14 (−0.39, 0.67) 0.60
2-h post-load glucose Crude 0.14 (−0.32, 0.60) 0.55
Adjusted 2.45 (−0.27, 5.17) 0.08
Traffic indicators
 Street length in a 100 m buffer FBG Crude 2.70 (2.13, 3.27) <  0.01
Adjusted 2.57 (1.99, 3.19) <  0.01
1-h post-load glucose Crude 3.46 (1.51, 5.41) <  0.01
Adjusted 3.44 (1.49, 5.39) <  0.01
2-h post-load glucose Crude 2.18 (0.49, 3.87) 0.01
Adjusted −2.95 (−13.36, 7.46) 0.58
 Street length in a 300 m buffer FBG Crude 0.22 (− 1.17, 1.63) 0.75
Adjusted −0.16 (−1.53, 1.22) 0.82
1-h post-load glucose Crude 0.00 (−4.15, 4.16) 0.99
Adjusted −1.00 (−5.05, 3.06) 0.63
2-h post-load glucose Crude −0.36 (−3.92, 3.20) 0.84
Adjusted −2.46 (−23.48, 18.57) 0.82
 Street length in a 500 m buffer FBG Crude 0.07 (−1.37, 1.52) 0.92
Adjusted −0.29 (−1.71, 1.13) 0.69
1-h post-load glucose Crude 0.20 (−4.08, 4.50) 0.92
Adjusted −0.84 (−5.04, 3.77) 0.70
2-h post-load glucose Crude −0.55 (−4.22, 3.12) 0.76
Adjusted −5.89 (−27.66, 15.87) 0.59
 Proximity to major roads FBG Crude −3.49 (−4.56, −2.43) <  0.01
Adjusted −3.29 (−4.35, −2.23) <  0.01
1-h post-load glucose Crude −4.17 (−7.58, −0.75) <  0.01
Adjusted −3.65 (−7.01, −0.28) 0.03
2-h post-load glucose Crude −3.74 (−6.66, −0.82) 0.01
Adjusted −4.39 (−22.00, 13.23) 0.62
  1. aAdjusted for the maternal age, exposure to environmental tobacco smoke, percentage of illiterate as well as unemployed adults per census tract
  2. CI confidence interval, FBS fasting blood glucose. The regression coefficients were reported based on 1 IQR increase in PM1, PM2.5, PM10, total street length in different buffers and proximity to major roads