Table 2 Predicting child IQ from Water As measured from the kitchen tap
From: A cross-sectional study of well water arsenic and child IQ in Maine schoolchildren
Contributors | Full scale B ± se | Working memory B ± se | Perceptual reasoning B ± se | Verbal comprehension B ± se | Processing speed B ± se |
|---|---|---|---|---|---|
Model 1: Without adjustment | |||||
Water As < 5 μg/L | |||||
10 > WAs ≥5 μg/L | −6.96 ± 2.10** | −5.24 ± 2.26* | −5.94 ± 2.21** | −7.54 ± 2.65** | −1.34 ± 2.08 |
20 > WAs ≥ 10 μg/L | −4.57 ± 2.00* | −2.54 ± 2.16 | −6.68 ± 2.11** | −3.40 ± 2.53 | −0.61 ± 1.99 |
WAs ≥ 20 μg/L | −4.63 ± 2.39# | −6.47 ± 2.57* | −3.97 ± 2.51 | −3.49 ± 3.02 | 0.06 ± 2.37 |
R2 | 5.03% | 3.50% | 5.02% | 3.14% | 0.18% |
Model 2: Adjusting for other features | |||||
Water As < 5 μg/L | |||||
10 > WAs ≥5 μg/L | −6.09 ± 1.98** | −4.88 ± 2.24* | −4.97 ± 2.14* | −6.22 ± 2.49* | −1.74 ± 2.09 |
20 > WAs ≥ 10 μg/L | −3.15 ± 1.91 | −1.13 ± 2.16 | −5.10 ± 2.06* | −1.86 ± 2.39 | −1.15 ± 2.01 |
WAs ≥ 20 μg/L | −2.51 ± 2.29 | −5.07 ± 2.59# | −2.29 ± 2.47 | −0.82 ± 2.88 | 0.40 ± 2.42 |
Number of other children in home | −0.17 ± 0.79 | 0.84 ± 0.89 | 0.36 ± 0.85 | −0.72 ± 0.99 | −0.84 ± 0.83 |
Maternal IQ | 0.27 ± 0.07*** | 0.23 ± 0.08** | 0.25 ± 0.08*** | 0.32 ± 0.09*** | −0.04 ± 0.07 |
Maternal Ed (> HS) | 4.35 ± 1.62** | 0.32 ± 1.84 | 1.42 ± 1.75 | 7.62 ± 2.04*** | 3.14 ± 1.72# |
HOME | |||||
Missing 6+ items | −5.16 ± 2.54* | −3.34 ± 2.87 | −7.44 ± 2.74** | −3.96 ± 3.19 | −0.70 ± 2.68 |
Low scores | −1.96 ± 1.58 | −2.21 ± 1.79 | −2.45 ± 1.71 | 0.22 ± 1.99 | −1.95 ± 1.67 |
School district (compared to “C”) | |||||
District “A” | −1.70 ± 1.71 | 0.47 ± 1.94 | 0.22 ± 1.84 | −3.26 + 2.15 | −3.71 + 1.80* |
District “B” | 1.20 ± 1.97 | −0.67 ± 2.24 | 1.44 ± 2.13 | 3.15 + 2.48 | −2.27 + 2.08 |
R2 | 19.60% | 9.46% | 15.37% | 19.06% | 4.49% |
WAs∆R2 | 3.18% | 2.48% | 2.98% | 1.97% | 0.37% |