At 3 months after surgery , auto-crosslinked HA gel resulted in significantly higher effective rate for reduction of adhesion , the effective rate were 76 % ( 42/55 ) and 48 % ( 27/56 ) respectively ( P = 0.000 9 ) ; the total AFS score of treatment group was 2.1 1.1 , and significantly lower than that of control group ( 3.7 2.5 , P = 0.000 8 ) .