Table 1 Socio-demographic characteristics of the study cohort

Age (years)

28.3 ± 4 (27)

28.2 ± 4.2 (27)

27.8 ± 4.6 (27)

28.6 ± 4.3 (27)

0.962^K

28.2 ± 4.2 (27)

"Relationship length" (years)

0.292^C

 Less than 5

13 (59.1%)

7 (41.2%)

5 (27.8%)

13 (56.5%)

38 (47.5%)

 5 to 10

5 (22.7%)

5 (29.4%)

9 (50%)

8 (34.8%)

27 (33.8%)

 More than 10

4 (18.2%)

5 (29.4%)

4 (22.2%)

2 (8.7%)

15 (18.8%)

Education

0.058^C

 High School

2 (9.1%)

3 (17.6%)

8 (44.4%)

5 (21.7%)

18 (22.5%)

 College / Post-Graduation

20 (90.9%)

14 (82.4%)

10 (55.6%)

18 (78.3%)

62 (77.5%)

Physical activity (3 h / week)

11 (50%)

6 (35.3%)

6 (33.3%)

17 (73.9%)

0.053^C

40 (50%)

Parturition

0.261^C

 0

15 (71.4%)

9 (52.9%)

7 (41.2%)

14 (63.6%)

45 (58.4%)

 1 or more

6 (28.6%)

7 (47.1%)

10 (58.8%)

8 (36.4%)

32 (41.6%)

Hormonal contraceptive use before study

0.800^C

 None

13 (59.1%)

11 (64.7%)

9 (50%)

12 (52.2%)

45 (56.3%)

 Combined estrogen-progestin/Progestin only

9 (40.9%)

6 (35.3%)

9 (50%)

11 (47.8%)

35 (43.7%)