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Table 3 Sample characteristics by school district

From: A cross-sectional study of well water arsenic and child IQ in Maine schoolchildren

Characteristics District “A” (n = 78) District ”B” (n = 51) District ”C” (n = 143)
WAs ≥10 μg/L 21.8% (17) 37.3% (19) 34.3% (49)
HOME score    
≥53 61.5% (48) 51.0% (26) 40.6% (58)
<53 35.9% (28) 49.0% (25) 40.6% (58)
Missing 6+ items 2.6% (2) 0% (0) 18.9% (27)
Maternal education ≥ 16 years 64.1% (50) 33.3% (17) 51.1% (73)
Maternal IQ mean ± SD 118.47 ± 8.65 113.25 ± 11.95 113.43 ± 11.96
Home has filtration or water treatment system 68.0% (53) 52.9% (27) 47.6% (68)