Table 2. Correlation among different endometriosis-related pain symptoms of 77 women with histologically confirmed deep endometriosis.

Symptoms	Dyspareunia	Chronic pelvic pain	M-dyschezia	NM-dyschezia
Dysmenorrhea	0.141 (0.244)	0.194 (0.108)	0.143 (0.238)	0.107 (0.380)
Dyspareunia		0.441 (<0.001)	0.375 (0.001)	0.336 (0.004)
Chronic pelvic pain			0.388 (0.001)	0.472 (<0.001)
M-dyschezia				0.488 (<0.001)

Chronic pelvic pain defined as recurrent or constant pain in the lower abdominal region that has lasted for at least 6 months [22]. M: menstrual. Pain was quantified through a visual analogue scale (0–10). Non-parametric bivariate Spearman correlations expressed by coefficient of correlation and P values (between parentheses). Significant correlations (P<0.05) in bold.

NM, non-menstrual.