Table 1 Sociodemographic and pregnancy related characteristics of the OC group and reference groups

OC group

(N = 34)

COVID-19 reference group

(N = 209)

Pre-COVID-19 reference group

(N = 297)

F

Mean (SD)

Range

Mean (SD)

Range

Mean (SD)

Range

Age

32.59 (3.66)

24–41

30.80 (3.47)

19–45

30.92 (3.73)

21–41

3.64*

Gestational age

30 (5.76)

18–40

28.06 (0.87)

26–33

28.50 (1.13)

26–38

13.35***

N (%)

N (%)

N (%)

χ²

Living with partner

33 (97.1)

201 (98)

284 (97.3)

0.35

Level of education

21.95**

  -Primary

0 (0)

0 (0)

1 (0.3)

  -Lower secondary

0 (0)

4 (2.0)

11 (3.8)

  -Higher secondary

2 (5.9)

3 (1.5)

4 (1.4)

  -Vocational

0 (0)

47 (22.9)

85 (29.1)

  -(Applied) Sciences

32 (94.1)

151 (73.7)

191 (65.4)

Population group

7.41*

  -Dutch

31 (91.2)

199 (97.1)

288 (98.6)

  -Other

3 (8.8)

6 (2.9)

4 (1.4)

Primiparous

23 (67.6)

99 (48.3)

159 (55.2)

5.30