Table 8

Mann-Whitney comparisons of metabolite levels, expressed in different units, between urban and rural populations

Population and metabolite assessed

Statistical significance (p value) of comparisons between the urban and rural population

Comparison of weight-adjusted excretion rates (nmol/kg bw/h)

Comparison of volume-weighted concentrations (nmol/L)

Comparison of creatinine-adjusted concentrations (μmol/mol of creatinine)

Adults

DCCA

0.128

0.139

0.465

PBA

0.016*

0.010*

0.093

Children

DCCA

0.032*

0.042*

0.029*

PBA

0.027*

0.023*

0.023*

*Indicates a significant difference

Fortin et al. Environmental Health 2008 7:55   doi:10.1186/1476-069X-7-55