Table 1. Comparison of demographics and radiographical parameters among four asymptomatic groups based on the degree of pelvic retroversion.

Variable	Group 1	Group 2	Group 3	Group 4	P
No. of subjects	20	20	20	22	–
Age (years)	32.25±12.23	38.30±21.81	39.65±22.67	62.91±19.43	<0.001***
PT/PI	0.04±0.06	0.20±0.03	0.28±0.02	0.40±0.07	<0.001***
PT (°)	1.63±2.78	9.74±2.99	11.63±2.95	21.74±7.25	<0.001***
PI (°)	41.62±7.50	47.61±11.42	41.57±8.93	54.54±12.27	<0.001***
SS (°)	39.98±7.57	37.87±9.06	29.96±6.24	32.80±7.84	<0.001***
KA (°)	−0.24±3.71	−0.91±4.29	−2.43±4.38	2.84±6.58	0.007**
LL (°)	51.36±9.03	51.29±11.32	43.16±10.78	47.90±13.11	0.076
PI-LL (°)	−9.74±8.06	−3.68±4.84	−1.59±6.56	6.64±11.59	<0.001***
TK (°)	27.79±9.41	32.62±14.68	36.72±14.02	39.05±13.42	0.037*
LL/TK	2.15±1.05	1.76±0.59	1.30±0.59	1.30±0.37	<0.001***
CL (°)	0.21±10.89	0.84±17.62	5.69±12.69	15.59±12.95	0.001**
SVA (mm)	−6.09±25.52	6.46±35.87	7.21±29.13	26.71±31.71	0.009**
P. Shift (mm)	−27.11±17.96	−10.26±30.32	−11.99±26.34	12.36±35.49	<0.001***
Cr-A (mm)	34.05±26.20	37.00±23.63	40.51±27.18	23.94±30.08	0.224
C2-FH (mm)	−11.31±24.95	−9.70±38.20	−11.17±32.59	−10.55±27.20	0.998
Cr-FH (mm)	−8.34±22.72	−3.76±33.23	−9.99±33.66	−14.48±22.26	0.676

*, P<0.05; **, P<0.01; ***, P<0.001. PT, pelvic tilt; PI, pelvic incidence; SS, sacrum slope; KA, knee angle; LL, lumbar lordosis; PI-LL, PI and LL mismatch; TK, thoracic kyphosis; CL, cervical lordosis; SVA, sagittal vertical axis; P. Shift, pelvic translation; Cr-A, cranial sagittal vertical axis-ankle; C2-FH, C2 sagittal vertical axis-femoral head; Cr-FH, cranial sagittal vertical axis-femoral head.