Table 2 Univariate and logistic regression analysis of factors related recurrence after USO for unilateral ovarian endometrioma

N

8

42

Age at the time of operation

41.0 ± 2.9 (36–44)

41.5 ± 2.2 (36–44)

NS

Gravity

0.63 ± 0.74 (0–2)

0.90 ± 0.97 (0–3)

NS

Parity

0.38 ± 0.52 (0–1)

0.73 ± 0.84 (0–3)

NS

Right endometrioma

5 (62.5%)

20 (47.6%)

Left endometrioma

3 (37.5%)

22 (52.4%)

NS

Diameter of largest cyst (cm)

4.75 ± 1.16 (3–7)

5.81 ± 1.99 (2–10)

NS

NS

Multilocular cyst

1 (14.3%)

8 (19.1%)

NS

Leiomyoma

4 (50.0%)

18 (42.9%)

NS

Adenomyosis

1 (14.3%)

7 (16.7%)

NS

Dysmenorrhea

5 (62.5%)

24 (58.5%)

NS

Infertility

2 (25.0%)

2 (5.1%)

NS

concurrent hysterectomy

0 (0.0%)

2 (4.8%)

NS

r-ASRM score

48.3 ± 24.8 (26–90)

56.8 ± 29.2 (21–126)

NS

NS

Adhesion score in the ipsilateral side

8.0 ± 26.8 (4–24)

12.1 ± 8.0 (0–32)

NS

Adhesion score in the contralateral side

4.0 ± 2.1 (0–8)

5.4 ± 9.0 (0–32)

NS

Adhesion score in the ipsilateral side ≥4

7 (87.5%)

38 (90.5%)

NS

Adhesion score in the ipsilateral side ≥16

1 (12.5%)

20 (47.6%)

NS

NS

Adhesion score in the contralateral side ≥4

7 (87.5%)

14 (33.3%)

P = 0.0067

P = 0.020

Adhesion score in the contralateral side ≥16

0 (0.0%)

5 (11.9%)

NS

Pouch of Douglas obliteration

4 (50.0%)

29 (69.0%)

NS

Postoperative follow-up period(month)

54.2 ± 11.2 (41–73)

44.5 ± 12.7 (15–69)

P = 0.0470

Postoperative hormonal therapy

1 (12.5%)

9 (21.4%)

NS

Oral contraceptives

0 (0.0%)

3 (7.1%)

NS

Dienogest

1 (12.5%)

6 (14.3%)

NS

Postoperative fertility treatment

1 (12.5%)

1 (2.4%)

NS

Postoperative pregnancy

0 (0.0%)

0 (0.0%)

NS

Postoperative parturition

0 (0.0%)

0 (0.0%)

NS