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Table 3 The distribution of FPG and 1 h-PG (mmol/L) according to participant’s demographic characteristics

From: Concentrations of perfluoroalkyl and polyfluoroalkyl substances and blood glucose in pregnant women

Characteristics FPG(N = 856) 1 h-PG(N = 705)
Mean ± SD P-value Mean ± SD P-value
Total 4.04 ± 0.45   6.46 ± 1.37  
Maternal age at enrollment (years)   0.675   < 0.001
  < 25 4.01 ± 0.39   5.99 ± 1.28  
 25–35 4.04 ± 0.45   6.54 ± 1.35*  
  ≥ 35 4.08 ± 0.49   6.73 ± 1.70*  
Pre-pregnancy BMI (kg/m2)   0.854   0.097
  < 18.5 4.06 ± 0.47   6.25 ± 1.38  
 18.5–24.9 4.04 ± 0.44   6.52 ± 1.36  
  ≥ 25 4.09 ± 0.45   6.65 ± 1.43  
Maternal education   0.077   0.032
 Below high school 4.15 ± 0.44   6.05 ± 1.55  
 High School 4.05 ± 0.46   6.41 ± 1.54  
 College or above 4.02 ± 0.44   6.52 ± 1.30*  
Per capita household income (CNY)   0.341   0.702
  < 4000 4.05 ± 0.39   6.46 ± 1.33  
 4000–8000 4.05 ± 0.46   6.49 ± 1.37  
  > 8000 3.99 ± 0.47   6.37 ± 1.39  
Passive smoking   0.512   0.803
 Yes 4.07 ± 0.47   6.44 ± 1.40  
 No 4.05 ± 0.43   6.47 ± 1.38  
Pregnancy complication   0.725   0.146
 Yes 4.28 ± 0.43   6.76 ± 1.54  
 No 4.04 ± 0.45   6.45 ± 1.39  
History of abortion and stillbirth   0.156   0.426
 Yes 4.25 ± 0.43   6.52 ± 1.5  
 No 4.07 + 0.43   6.44 + 1.33  
Parity   0.003   0.059
 0 4.07 ± 0.48   6.43 ± 1.36  
  ≥ 1 4.15 ± 0.43   6.72 ± 1.61  
  1. FPG fasting plasma glucose, 1 h-PG 1 h-plasma glucose after a 50-g oral glucose tolerance test
  2. *, p < 0.05, compared with the first group