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Table 1 Sociodemographic and pregnancy-related characteristics of women who provided self-reported information about LBP during pregnancy in the 2015 Birth cohort. (n = 3827)

From: Are leisure-time and work-related activities associated with low back pain during pregnancy?

Age (years)

N (%)

13–19

562 (14.7)

20–29

1802 (47.1)

30–39

1349 (35.3)

40–47

113 (2.9)

Schooling (years)

 0–4

332 (8.7)

 5–8

989 (25.9)

 9–11

1343 (35.1)

  ≥ 12

1161 (30.3)

Family Income

 1 (poorest)

761 (19.9)

 2

764 (19.9)

 3

771 (20.3)

 4

782 (20.4)

 5 (wealthiest)

747 (19.5)

Smoking

 No

3216 (84.1)

 Yes

608 (15.9)

Type of birth

 Vaginal

1352 (35.3)

 Caesarean

2474 (64.7)

Eclampsia

 No

3568 (93.5)

 Yes

246 (6.5)

Depression

 No

3380 (88.4)

 Yes

445 (11.6)

Urinary infection

 No

2079 (54.4)

 Yes

1740 (45.6)

Multiple birth

 No

3728 (97.4)

 Yes

99 (2.6)

Parity

 1

1684 (44.0)

 2

1169 (30.6)

 3 or more

972 (25.4)