The healing time of simple low anorectal fistula in the study group and the control group were ( 22.26 + / -8.67 ) d and ( 31.41 + / -11.39 ) d respectively , while the healing time of simple high anorectal fistula in the study group and the control group were ( 24.73 + / -8.15 ) d and ( 32.20 + / -12.60 ) d respectively , and there revealed significant differences between these two groups .
