The serum levels of DAO in T group on PBD 3 , 7 [ ( 3.0 + / - 0.4 ) , ( 2.9 + / - 0.5 ) U/mL ] were significantly lower than those in C group [ ( 3.9 + / - 0.5 ) , ( 3.6 + / - 0.6 ) U/mL , with t value respectively 3.982 , 4.236 , P values all below 0.05 ] , and there was no obvious difference between T and C groups on PBD 14 ( t = 1.762 , P > 0.05 ) .
