Table 1.

Comparison of baseline patients and fistula characteristics between patients with and without preoperative seton drainage

		Seton	No seton
Internal opening	Posterior	63%	70%
	Anterior	29%	26%
	Lateral	7%	4%
Horseshoe extension	Yes	50%	47%
	No	50%	53%
Prior attempts at repair	Yes	59%	56%
	No	41%	44%
Gender Ratio (M/F)		2:1	2:1
Age (range)		43 (21–69)	46 (19–73)
Body mass index		24	25
Smoking	Yes	56%	52%
	No	44%	48%