Table 2. Existence of a lumen in the lower rectum and patients’ subjective satisfaction of effectiveness by aluminum potassium sulfate and tannic acid sclerotherapy on postoperative day 7.

Subjective satisfaction	On postoperative day 7		P value
	Lumen negative (n=9)	Lumen positive (n=232)
C-1	5 (55.6)	170 (73.3)	0.0186
C-2	3 (33.3)	62 (26.7)
C-3	1 (11.1)	0 (0.0)

Data are presented as No. (%). C-1, complete disappearance of subjective symptoms; C-3, unchanged compared with preoperative symptoms; C-2, between C-1 and C-3.