Table 1.

Differences Between Cases With Pelvic Girdle Pain and Controls

Characteristics	Cases (n = 35)	Controls  (n = 70)	P
Age, mean (SD), ya	32.86 (4.51)	33.00 (4.22)	.873
Parity, mean (SD)	1.77 (0.89)	1.77 (0.89)	.997
Body mass index before pregnancy, mean (SD), kg/m2	24.52 (4.55)	22.52 (3.18)	.037
Weight gain during pregnancy, mean (SD), g	14.29 (4.82)	15.11 (4.85)	.274
Infant body mass, mean (SD), g	3460.14 (431.80)	3454.71 (414.47)	.743
Higher education, n (%)	31 (88.6)	65 (92.9)	.460
Pelvic girdle pain during pregnancy (self-reported), n (%)	25 (71.4)	28 (40)	.002
Duration of 2nd stage of labor, mean (SD), min	29.57 (25.05)	27.44 (21.35)	.922

^a Normally distributed data, tested with the Student t test. All the other continuous variables were not normally distributed and were tested with the Mann–Whitney U test.

Values in bold are results that reached statistical significance.