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Table 2 Descriptive statistics for exposure to iAs in drinking water and iAs metabolites in urine

From: Exposure to arsenic in drinking water is associated with increased prevalence of diabetes: a cross-sectional study in the Zimapán and Lagunera regions in Mexico

Exposure to iAs in Water Na Range AM GM GSD
iAs, current concentration (ppb) 258 3.1 215.2 42.9 24.4 2.9
iAs, cumulative exposure 1993-2008 (ppm.years) 255 0.0 6.73 1.8 1.3 2.3
iAs, cumulative exposure 1993-1997 (ppm.years) 255 0.0 5.8 0.7 0.5 2.8
iAs, cumulative exposure 1998-2002 (ppm.years) 255 0.0 4.5 0.6 0.5 2.3
iAs, cumulative exposure 2002-2007 (ppm.years) 255 0.0 1.2 0.5 0.4 2.1
Metabolites of iAs in Urine (ng/mL)       
tAs 256 2.3 233.7 41.2 24.7 2.8
iAsIII 257 0.1 37.2 4.2 2.1 3.4
MAsIII 257 ND 2.4 0.4 0.1 2.3
DMAsIII 257 ND 64.8 4.7 0.9 3.2
iAsV 257 ND 32.9 1.4 1.5 4.7
MAsV 257 0.1 36.2 5.0 1.1 1.1
DMAsV 257 0.1 162.6 22.5 2.4 1.3
DMAs/MAs ratio 257 0.4 26.4 5.6 4.8 1.7
MAs/iAs ratio 257 0.0 5.1 1.3 1.1 2.0
  1. Abbreviations: AM, arithmetic mean; GM, geometric mean; GSD, geometric standard deviation; ND, not detected.
  2. a All 258 subjects provided sample of drinking water for iAs analysis; urine samples were collected from 257 subjects and analyzed for As species; only 256 urine samples were analyzed for tAs; cumulative exposure was calculated for 255 subjects.