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. 2017 Sep 29;17:331. doi: 10.1186/s12884-017-1528-9

Table 1.

Demographic and clinical features for the treatment and control group at baseline. Given as counts (%) unless otherwise stated

Treatment group
n = 28
Control group
n = 28
Age at inclusion (years), mean (SD) 28.9 (4.5) 29.9 (4.8)
Age ≥ 30 13 of 28 (46) 14 of 28 (50)
Primiparous 16 of 26 (62) 15 of 27 (56)
Education length (years)a, mean (SD) 14.7 (4.0) 14.8 (3.1)
More than 12 y education baseline 21 of 27 (78) 21 of 25 (84)
Heavy workload baseline 6 of 28 (21) 6 of 28 (21)
BMI before pregnancy, mean (SD) 23.4 (3.1) 24.2 (4.0)
Depressed in pregnancy 1 of 27 (4) 1 of 28 (4)
Exercise before pregnancy 5 of 26 (19) 12 of 27 (44)
Exercise in early pregnancy (week 1 to18) 2 of 27 (7) 5 of 27 (19)
PP one year before pregnancy 9 of 27 (33) 4 of 27 (15)
PP and LBP in early pregnancy (week 1 to 18) 22 of 26 (85) 22 of 27 (82)
Sick leave in early pregnancyb (week 1 to 18) 6 of 28 (21) 3 of 28 (11)

SD standard deviation BMI body mass index PP pelvic pain LBP low back pain

an for education length is 27 and 25 for treatment and control group, respectively

bOnly sick leave due to PGP and/or LBP