Table 1 Baseline characteristics of patients with EBOTs

Age at first diagnosis (years)

33.9 ± 7.4

49.3 ± 9.9

<0.001^a

BMI (Kg/m²)

22.9 ± 3.7

23.6 ± 2.3

0.45^a

Nulliparous

<0.001^b

 Yes

23

5

 No

6

25

Preoperative serum CA 125 (n = 54)

50.8 (21.2–327.5)

140.5 (9.5–2655.0)

0.026^c

Preoperative serum CA 19–9 (n = 31)

22.6 (7.5–687.4)

243.3 (10.1–70,148)

0.017^c

Tumor size (cm)

7.5 ± 3.3

7.5 ± 3.4

0.98^a

Surgical approach

<0.001^b

 Laparoscopy

21

3

 Laparotomy

8

27

Complete staging

<0.001^b

 Yes

9

23

 No

20

7

Stage

0.35^b

 I

28

26

 II-III

1

4

Microinvasion

1.00^b

 Yes

0

1

 No

29

29

Intra-epithelial carcinoma

0.14^b

 Yes

9

15

 No

20

15

Associated endometriosis

0.91^b

 Yes

12

15

 No

17

15

Endometrial evaluations (n = 47)

0.026^b

 Normal

7

18

 EIN/EC

11

11

Adjuvant therapy

0.18^b

 No

23

19

 Chemotherapy

6

11