Table 2.

Various classifications of perianal fistulas

	N (%)
Primary fistulas	169
Park’s classification	150
intersphincteric	82 (54.7%)
trans-sphincteric	58 (38.6%)
suprasphincteric	8 (5.3%)
eatrasphincteric	1 (0.7%)
diffuse intersphincteric with trans-sphincteric	1 (0.7%)
Other types except Park’s classification	19
submucosal	13 (68.4%)
high deep intermuscular space	5 (26.3%)
rectovaginal fistula	1 (5.3%)
St. James’s grade	149
grade 1	52 (34.9%)
grade 2	30 (20.1%)
grade 3	20 (13.4%)
grade 4	38 (25.5%)
grade 5	9 (6.1%)
SPTF classification	169
simple	92 (54.4%)
complex	77 (45.6%)
Classification by position of internal opening	169
high site	72 (42.6%)
low site	97 (57.4%)