Table 2. Sonographic (transvaginal ultrasonography with intestinal preparation) features of recto-sigmoid endometriotic lesions per group (success or failure of medical treatment).

Recto-sigmoid lesion features		Medical treatment		p value
		Success (n=143)	Failure (n=95)
Larger diameter, cm		2.1±1.9	3.1±2.2	0.008*
Distance from anal verge, cm		11.2±2.9	11.0±2.8	0.66*
Compromised circumference, %		25.0±11.4	28.8±10.6	0.02*
Affected layer				0.16†
	Serosa	14 (9.8)	9 (9.5)
	Muscularis	96 (65.7)	58 (61.1)
	Mucosa	13 (9.1)	18 (18.9)
	Not reported	20 (14.0)	10 (10.5)

Results expressed as mean±standard deviation or n (%).

^*Student t test;

^†χ² test.