Table 3 Stepwise logistic regression using persistence of significant post delivery back pain as dependent variable

Significant variables

Weight Gain at 2 years post delivery

-0.653

0.303

4.62

0.03

1.92

1.05 to 3.48

BMD change at 2 years post delivery

-21.9

10.26

4.55

0.03

0.11

0.01 to 0.96

Excluded variables

Age

0.0529

0.113

0.203

0.65

1.05

0.84 to1.32

Early pregnancy BMI

-0.406

0.238

2.90

0.08

0.66

0.41 to 1.06

Early pregnancy fat percentage

0.131

0.125

1.09

0.29

1.14

0.89 to 1.45

Early pregnancy BMD

0.208

3.944

0.002

0.95

1.23

0.03 to 5.7

Weight gain in pregnancy

-0.031

0.129

0.058

0.80

0.96

0.75 to 1.24

Fat gain in pregnancy

-0.253

0.211

1.434

0.23

0.77

0.51 to 1.17

Pregnancy BMD loss

25.26

16.97

2.21

0.13

0.37

0.06 to 8.91

Fat change at 2 years post delivery

-0.406

0.267

2.32

0.13

0.67

0.39 to 1.13