Table 1 Characteristics of patients who underwent USO or cystectomy for unilateral ovarian endometrioma

N

50

60

Age at the time of operation

41.4 ± 2.3 (36–44)

38.2 ± 2.4 (35–43)

P < 0.0001

Gravity

0.86 ± 0.94 (0–3)

0.22 ± 0.53 (0–3)

P < 0.0001

Parity

0.67 ± 0.80 (0–3)

0.17 ± 0.46 (0–2)

P < 0.0001

Right endometrioma

25 (50.0%)

30 (50.0%)

Left endometrioma

25 (50.0%)

30 (50.0%)

NS

Diameter of largest cyst (cm)

5.64 ± 1.91 (2–10)

5.26 ± 2.65 (1–15)

NS

Multilocular cyst

9 (18.0%)

9 (15.0%)

NS

Leiomyoma

22 (44.0%)

25 (41.7%)

NS

Adenomyosis

8 (16.0%)

9 (15.0%)

NS

Dysmenorhea

29 (59.2%)

24 (40.0%)

NS

Infertility

4 (8.5%)

19 (31.7%)

P = 0.0042

Concurrent hysterectomy

2 (4.0%)

0 (0.0%)

NS

reASRMscore

55.5 ± 28.5 (21–126)

43.8 ± 27.6 (16–124)

P = 0.0321

Adhesion score in the ipsilateral side

11.5 ± 7.9 (0–32)

8.4 ± 8.2 (0–32)

P = 0.0476

Adhesion score in the contralateral side

5.1 ± 8.3 (0–32)

3.8 ± 7.9 (0–32)

NS

Adhesion score in the ipsilateral side ≥4

45 (90.0%)

48 (80.0%)

NS

Adhesion score in the ipsilateral side ≥16

21 (42.0%)

13 (27.7%)

P = 0.0245

Adhesion score in the contralateral side ≥4

21 (42.0%)

16 (26.7%)

NS

Adhesion score in the contralateral side ≥16

5 (10.0%)

7 (11.7%)

NS

Pouch of Douglas obliteration

33 (66.0%)

27 (45.0%)

P = 0.0349

Postoperative follow-up period(month)

46.0 ± 12.9 (15–73)

38.8 ± 22.0 (4–75)

P = 0.0425

Postoperative hormonal therapy

10 (20.0%)

24 (41.7%)

P = 0.0375

 Oral contraceptives

3 (6.0%)

16 (26.7%)

 Dienogest

7 (14.0%)

8 (13.3%)

Postoperative fertility treatment

2 (4.0%)

18 (42.9%)

P = 0.0004

Postoperative pregnancy

0 (0.0%)

8 (13.3%)

P = 0.0076

Postoperative parturition

0 (0.0%)

7 (11.7%)

P = 0.0165

Postoperative recurrence

8 (16.0%)

7 (11.7%)

NS

Time to recurrence (month)

22.3 ± 19.7 (2–54)

17.7 ± 15.6 (2–45)

NS