Mean composite CHG skin-surface concentrations were significantly higher ( p < 0.007 ) in EAS groups A1 ( 30.9 8.8 g/mL ) and B1 ( 29.0 8.3 g/mL ) compared with non-EAS groups A2 ( 10.5 3.9 g/mL ) and B2 ( 9.5 3.1 g/mL ) .