Table 1.

Sagittal radiographic outcomes for normal group.

Author	# Patients	Age mean (SD)	Standing mean (SD)			Sitting mean (SD)
			SVA	TK	LL	SVA	TK	LL
Zhao et al., 202242	145	23.1 (2.3)	−20.1 (22.4)	26.1 (10.2)	50.4 (10.0)	26.9 (10.2)	20.0 (8.9)	25.3 (11.8)
Zhou et al., 20203	140	23.2 (2.6)	−20.5 (20.8)	26 (10.3)	50.5 (9.4)	25 (26.3)	20.1 (8.7)	25.5 (11.6)
Zhou et al., 20203	95	53.3 (6.2)	−9 (25.4)	34 (9.6)	51.7 (10.5)	33.7 (21)	29.3 (10.2)	38.3 (11.6)
Nishida et al., 202044	113	45.2	–	24.1 (8.4)	35.6 (9.6)	–	22.8 (8.2)	–
Maekawa 201945	105	33.3 (8.4)	–	–	49.3 (14.2)	–	–	23.3 (13.4)
Maekawa 201945	80	61.6 (5.4)	–	–	40.8 (11.5)	–	–	24.9 (16.2)
Maekawa 201945	68	75.6 (4.6)	–	–	42.1 (14.1)	–	–	27.1 (14.8)
Chevillotte 201846	15	42.9	–	–	54.8 (9.8)	–	–	15.9 (14.6)
Suzuki et al., 201838	25	26.9 (6.3)	–	–	31.9 (10.4)	–	–	7.9 (10.8)
Suzuki et al., 201640	73	34.4 (8.1)	–	–	31.3 (10.4)	–	–	15.5 (10.1)
Suzuki et al., 201640	107	67.6 (8.3)	–	–	26.6 (12.8)	–	–	16.0 (13.9)
Cho et al., 201547	30	31.1 (1.9)	–	–	47.1 (0.5)	–	–	17.7 (4.4)
Lee et al., 201437	10	25.4 (2.3)	–	–	52.8 (7.9)	–	–	13.5 (11.6)
Lee et al., 201437	10	66.7 (1.7)	–	–	53.9 (15.9)	–	–	27.9 (9.3)
Endo et al., 201236	50	31.5 (7.4)	–	–	33.3 (11.2)	–	–	16.7 (11.2)
Weighted Average (mean [95% CI])			−16.8 [-32.7; −0.8]	27.5 [20.6; 34.5]	43.3 [38.0; 48.5]	28.4 [17.4; 39.4]	23.0 [16.1; 29.9]	21.3[16.8; 25.7]