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Table 2 Hair & nail arsenic concentrations and their correlations with water arsenic concentrations

From: Association between arsenic exposure and plasma cholinesterase activity: a population based study in Bangladesh

Water arsenic exposure n Hair arsenic concentration Nail arsenic concentration
   [μg/g (Mean ± SD)] Spearman r [μg/g (Mean ± SD)] Spearman r
Low (< 129) 44 1.83 ± 3.00 0.413** 3.51 ± 4.41 0.421**
Medium (130-264) 50 4.08 ± 2.60 0.489** 6.32 ± 5.62 0.384*
High (> 265) 47 9.74 ± 10.13 0.464** 12.51 ± 9.13 0.499***
All subjects 141 5.27 ± 7.06 0.524*** 7.51 ± 7.64 0.541***
  1. Here *p < 0.05, **p < 0.01 and ***p < 0.001 are from Spearman correlation coefficient test