Table 4. Group comparison of pelvic incidence values at 50°.

PI, n (%)	PI	PT	SS	TK	LL
<50°, 90 (71.43)	41.83±6.551	16.47±7.667	25.39±9.014	21.05±10.245	31.12±18.624
>50°, 36 (28.57)	57.40±4.913	23.03±7.728	34.36±8.805	23.51±9.490	42.26±15.533
t value	−14.536	−4.329	−5.078	−1.241	−3.171
P value	<0.001	<0.001	<0.001	0.217	0.002

Data are presented as mean ± standard deviation. Independent sample t-test, P<0.05. SS, sacral slope; PI, pelvic incidence; PT, pelvic tilt; TK, thoracic kyphosis; LL, lumbar lordosis.