Table 3.

The relation between the location of internal openings and the fistula type.

Fistula type Location of i.o	Low trans	High trans	Inter	Supra	Total
Anterior group	103	14	5	0	122
Posterior group	10	7	1	1	19
No i.o	7	1	0	1	9
Total	120	22	6	2	150

Low trans, low transsphincteric fistula; High trans, high transsphincteric fistula; Inter, intersphincteric fistula; Supra, suprasphincteric fistula; i.o, internal opening.

Data are presented as numbers of patients. There was a significant correlation (p < 0.05).