Table 1. Baseline characteristics of participants.
Baseline characteristics Overall TAI Control p value
Participants (%) 188 (100) 63 (34) 125 (66) NA
Age (years), mean ± SD 36.4±4.4 36.4±3.6 36.5±4.8 0.85*
BMI(Kg/m2) (%)
< 18.5
18.5 - 24.9
25.0 - 29.9
≥ 30

6 (3)
102 (57)
53 (30)
17 (10)

1 (2)
30 (53)
17 (30)
9 (16)

5 (4)
72 (60)
36 (30)
8 (7)
0.22***
Reason for seeking the clinic (%)
Infertility
Fertility preservation
Recurrent miscarriage
Reproductive evaluation
Reproductive counseling
Independent reproduction

135 (71.8)
24 (12.8)
7 (3.7)
10 (5.3)
11 (5.9)
1 (0.5)

45 (71.4)
9 (14.3)
3 (4.8)
2 (3.2)
4 (6.3)
0 (0.0)

90 (72)
15 (12.0)
4 (3.2)
8 (6.4)
7 (5.6)
1 (0.8)
0.914**
Infertility (%)
Yes
No

139 (73.9)
49 (26.1)

45 (71.4)
18 (28.6)

94 (75.2)
31 (24.8)
0.578***
Infertility cause (%)
Ovulatory disfunction
Tuboperitoneal factor/endometriosis
Uterine factor
Adenomyosis
Male factor
Unexplained infertility
More than one associated factor

19 (13.7)
36 (25.9)
5 (3.6)
3 (2.2)
41 (29.5)
4 (2.9)
31 (22.2)

5 (26.3)
9 (25.0)
0 (0.0)
0 (0.0)
15 (36.6)
0 (0.0)
16 (51.6)

14 (73.7)
27 (75.0)
5 (100)
3 (100)
26 (63.4)
4 (100)
15 (48.4)
0.132**
Endometriosis (%)
Yes
No

48 (25.5)
140 (74.5)

14 (22.2)
49 (77.8)

34 (27.2)
91 (72.8)
0.460***
Other autoimmune disease (%)
Yes
No

7 (3.7)
181 (96.3)

2 (3.2)
61 (96.8)

5 (4.0)
120 (96.0)
> 0.99****

SD=Standard deviation; NA=not applicable.
* by Student’s t test; ** by Fisher-Freeman-Halton test; *** by Chi-square test; **** by Fisher´s exact test.