Table 1 Descriptive statistics

N (%)

193 (34 %)

139 (24 %)

236 (42 %)

568 (100 %)

Age

29.7 (4.3)

30.5 (4.8)

29.8 (5.0)

=.254

30.0 (4.7)

Education

14.5 (2.4)

15.7 (2.4)*

15.4 (2.6)*

<.001

15.1 (2.6)

BMI before pregnancy

24.8 (4.6)

23.1 (3.6)*

23.4 (4.2)*

<.001

23.8 (4.3)

Total sick leave weeks

10.8 (9.4)

0.0 (0.0)*

8.4 (8.9)*

<.001

7.2 (9.0)

Workload

3.0 (1.1)

2.4 (1.1)*

2.6 (1.2)*

<.001

2.6 (1.1)

Work satisfaction

4.4 (0.8)

4.6 (0.7)*

4.3 (0.9)

<.001

4.4 (0.8)

Average PGP

26.8 (15.1)

6.7 (10.4)*

6.1 (10.0)*

<.001

13.3 (15.5)

Average LBP

13.2 (16.9)

4.7 (9.1)*

6.6 (11.4)*

<.001

8.4 (13.4)

Pain-related ADL (ODI)

1.9 (0.8)

0.9 (0.9)*

1.0 (0.8)*

<.001

1.4 (0.9)

Depressed

1.4 (0.5)

1.3 (0.5)

1.4 (0.6)

=.055

1.4 (0.5)

Mean no. of previous births

1.00 (0.06)

0.94 (0.09)

0.79 (0.05)***

<.05

0.90 (1.00)

Regular exercise before pregnancy

63 (33 %)

67 (49 %)**

94 (40 %)

=.013

224 (39 %)

Seated work

51 (27 %)

68 (49 %)*

81 (34 %)

<.001

200 (35 %)