Table 4.

Estimated effect of treatment adjusted for baseline imbalances^a

	Mean Differenceb β	95%CI	p
Pain intensityc, week 21 − 30	−0.4	−13.1 − 12.4	0.95
Pain intensityc, week 33 − 40	−2.7	−23.0 − 17.6	0.79
Pain intensityc, week 1 − 6 after delivery	5.4	−8.5 − 19.2	0.44
ODId, week 30	−1.2	−9.2 − 6.8	0.76
ODId, 6 weeks after delivery	−0.1	−5.3 − 5.2	0.97
EQ-5De, week 30	−2.7	−16.3 − 10.9	0.69
EQ-5De, 6 weeks after delivery	−1.3	−12.8 − 10.1	0.81

CI confidence interval ODI Oswestry disability index EQ-5D Eurocol-5D

^aPP one year before pregnancy and exercise before and in early pregnancy

^bResults from linear regression, adjusting for the relevant outcome measured at baseline

^cPain intensity (numerical rating scale) with possible values 0 to 100, where 0 represents no pain and 100 represents unbearable

^dOswestry disability index with possible values 0 to 100, where 0 represents no disability and 100 represents maximum disability possible

^eEurocol-5D with possible values −7 to 100, where −7 represents poorest health and 100 represents full health