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Table 2 Water and blood concentrations by clinic

From: Neurodevelopmental outcomes among 2- to 3-year-old children in Bangladesh with elevated blood lead and exposure to arsenic and manganese in drinking water

  Sirajdikhan Pabna  
Variable N % <LOD P25 Median P75 Maximum N %< LOD P25 Median P75 Maximum P-valuea
Water Arsenic, μg/L
 1st Trimester 238 29 LODb 1.3 1.9 380 286 11 5.3 26.5 81 1400 <0.0001
 1 month 238 49 LODb 0.8 1.9 120 285 10 5.9 31 120 1400 <0.0001
 12 months 92 40 LODb 0.8 38.2 701 99 13 4.5 30.5 125 828 <0.0001
 20–40 months 239 31 LODb 1.5 21.6 653 286 9 4.4 25.7 130 1470 <0.0001
Water Manganese, μg/L
 1st Trimester 239 13 30 540 960 3300 286 1 270 500 900 3300 0.02
 1 month 238 3 39 560 890 3900 278 0 340 545 1060 3900 0.0001
 12 months 92 0 217 1150 2000 4650 99 1 244 464 891 2470 0.009
 20–40 months 239 1 164 948 1820 4750 286 0 299 515 969 4050 0.003
Blood Lead, μg/dL 239 6 5.5 7.6 10.4 43 286 67 LODb LODb 3.8 13.8 <0.0001
  1. aWilcoxon rank sum test
  2. bLOD for water As = 0.5–0.75 μg/L, LOD for water Mn = 0.5 μg/L, LOD for blood lead = 3.3 μg/dL