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Table 3 Multiple liner regression analysis between fluoride exposure and children’s IQ scores

From: Fluoride exposure and intelligence in school-age children: evidence from different windows of exposure susceptibility

  < 1.7 mg/L ≥ 1.7 mg/L
n β (95% CI) P n β (95% CI) P
Totala 430 2.785(−0.832,6.403) 0.131 203 −4.965(−9.198, −0.732) 0.022
PFa 148 4.054(−3.169,11.277) 0.268 100 −3.929(−9.396,1.538) 0.156
PCa 282 3.146(−1.138,7.430) 0.149 103 −6.595(−13.323,0.133) 0.055
P for Interactionb    0.651    0.726
  1. aAdjusted for age, gender, gestational weeks, maternal education level, paternal education level, children’s BMI
  2. bAdjusted for age, gender, gestational weeks, maternal education level, paternal education level, children’s BMI, group (PF or PC), CUF