The levels of urine arsenic and CD3 ( + ) , CD4 ( + ) , CD4 ( + ) / CD8 ( + ) , C4 were inversely correlated correlation , while positive correlation existed between the level of urine arsenic and IgG ( r values were -0.68 , -0.56 , -0.51 , -0.43 and 0.36 , all P values < 0.01 ) .