Table 4.

Multivariate logistic regression analyses for investigation of impact of pre-operative characteristics on risk for failure of treatment

OR (95% CI) p value	aNo permanent pain reduction (n = 28/110)	bGC not improved (n = 37/122)	cReoperation (n=25/122)
Age per year	0.912 (0.850–0.980) p = 0.012	–	–
CPP	5.544 (1.338–22.965) p = 0.018	–	5.191 (1.100–24.501) p = 0.038
Dysmenorrhoe	–	0.239 (0.055–1.034) p = 0.056	–
Dispareunia	–	0.697 (0.277–1.753) p = 0.443	2.400 (0.786–7.335) p=0.124
Pre-operative NRS pain score per point	0.925 (0.944–0.982) p = 0.002	0.985 (0.961–1.010) p = 0.228	1.034 (1.000–1.070) p = 0.053

CPP chronic pelvic pain. Bold numbers indicate statistical significance (p ≤ 0.05)

^aNo permanent pain reduction was assumed if individual improvement of NRS Score at time of interview was lower than 20 points compared to pre-operative value. Median time between surgery and interview was 6 years (range 4.3–7.8). Only patients with a pre-operative NRS Score of > 20 were included

^bPatients who answered “no” when questioned “Do you think your quality of life has improved after surgery?”, GC subjective general condition

^cNeed for repeated endometriosis surgery