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Table 3 Factors measured in early pregnancy by women with and without persistent back pain post partum

From: Finger joint laxity, number of previous pregnancies and pregnancy induced back pain in a cohort study

 

Back pain group

No back pain group

 
 

n

Mean (SD) or n (%)

n

Mean (S.D.) or n (%)

p value

AA in early pregnancy (°)

16

44.1 (6.3)

154

39.7 (7.0)

0.019

AA pp – AA early pregnancy (°)

16

1.0 (7.1)

150

1.8 (5.0)

0.69

Age (yr)

16

29.1 (5.5)

155

27.7 (4.4)

0.25

Weight (kg)

16

67.0 (6.9)

154

63.4 (8.9)

0.12

Height (m)

16

1.66.1 (0.05)

153

1.66 (0.06)

0.86

Body mass index (kg/m2)

16

24.4 (2.8)

153

22.9 (2.9)

0.06

Cigarette smoking (%)

16

12 (2/16)

155

23 (35/155)

0.18

No. of previous pregnancies

16

1.6 (1.1)

154

0.8 (0.8)

0.0006

No. of previous deliveries

16

1.0 (0.8)

154

0.46 (0.6)

0.002

Time since previous delivery (yr)

11

3.5 (3.7)

60

3.3 (3.7)

0.88

Previous back pain, not in pregnancy (%)

16

44 (7/16)

155

57 (88/155)

0.13

Back pain in previous pregnancy (%)

13

77 (10/13)

89

34 (30/89)

0.003

  1. AA = passive abduction angle of left fourth finger, pp = post partum.
  2. Legend: Factors measured in early pregnancy by women reporting back pain induced in pregnancy and persisting 3 months post partum and those without such pain. Numbers of previous pregnancies and deliveries, abduction angle in early pregnancy and reported back pain in previous pregnancy were factors that significantly differed between the groups.