highly significantp < 0.0001
One factor ANOVA indicates highly significant elevations in Al (p < 0.0001), Cd ( p = 0.0012), Ni ( p < 0.0001), Co ( p < 0.0001) and Mn ( p = 0.0003) as well as moderately higher Pb ( p = 0.046) and As ( p = 0.084) levels in the PE group on a bulk level.