Table 2 Characteristics of women accepting or declining to participate in a RCT comparing two different drugs

Age (years)

39.4 ± 7.3

37.3 ± 7.8

0.07

Previous deliveries

22 (44 %)

139 (31 %)

0.08

Smoking

3 (6 %)

93 (21 %)

0.013

BMI (Kg/m²)

22.6 ± 1.5

23.0 ± 2.5

0.31

Education

0.45

  ≤ 13 years

25 (50 %)

196 (44 %)

  > 13 years

25 (50 %)

254 (56 %)

Previous surgery for endometriosis

0.59

 None

19 (38 %)

180 (40 %)

 One

24 (48 %)

186 (41 %)

  ≥ 2

7 (14 %)

84 (19 %)

Previous/current medical treatments^a

35 (70 %)

319 (71 %)

0.87

 Oral Contraceptives

21 (42 %)

193 (43 %)

1.00

 Progestins

13 (26 %)

150 (33 %)

0.34

 GnRH agonists

1 (2 %)

20 (4 %)

0.71

 Non-conventional drugs

6 (12 %)

19 (4 %)

0.03

Dysmenorrhea

 Biberoglu-Behrman grade 2-3

21 (42 %)

185 (41 %)

1.00

 NRS ≥ 8

14 (28 %)

149 (33 %)

0.53

Dyspareunia

 Biberoglu-Behrman grade 2-3

9 (18 %)

91 (20 %)

0.85

 NRS ≥ 8

4 (8 %)

53 (12 %)

0.64

Chronic pelvic pain

 Biberoglu-Behrman grade 2-3

7 (14 %)

77 (17 %)

0.69

 NRS ≥ 8

2 (4 %)

40 (9 %)

0.42

Use of analgesics

29 (58 %)

240 (53 %)

0.55

 Number of days per month^b

3.9 ± 3.7

4.0 ± 3.3

0.93