Table 1 Analyses of spinopelvic complex key elements lumbar flexibility (∆ LL = LL_standing − LL_sitting), pelvic mobility (∆ PT = PT_standing − PT_sitting) and hip motion (∆ PFA = PFA_standing-PFA_sitting) and spinopelvic parameter LL, PT and PFA in standing and sitting position of patients with pre-existing THA and the matched control group pre- and postoperatively

∆ LL (°)

21.6 (11.8)

12.4 (7.8)

 < .001

25.7 (11.0)

19.0 (10.2)

.011

∆ PT (°)

18.2 (10.7)

7.7 (8.0)

 < .001

22.2 (9.3)

17.0 (9.2)

.022

∆ PFA (°)

55.9 (15.9)

67.9 (14.0)

.002

51.1 (11.6)

55.2 (14.0)

.169

LL Stand (°)

LL Sit (°)

49.8 (13.6)

28.2 (11.5)

48.8 (15.1)

36.2 (15.6)

.788

.006

51.6 (13.4)

25.9 (14.2)

49.7 (14.0)

30.6 (14.4)

.875

.089

PT Stand (°)

PT Sit (°)

14.3 (8.1)

32.5 (11.1)

18.4 (8.2)

26.3 (11.2)

.035

.021

12.7 (9.1)

34.9 (10.1)

14.1 (8.7)

31.1 (10.6)

.554

.189

PFA Stand (°)

PFA Sit (°)

179.1 (9.8)

123.2 (14.7)

183.9 (11.8)

116.3 (13.4)

.047

.115

176.5 (10.8)

125.4 (12.7)

178.2 (10.4)

123.2 (15.5)

.612

.464

PI Stand (°)

54.7 (13.1)

56.1 (14.1)

.762

53.8 (12.5)

55.1 (13.0)

.767