Table 5. Comparison of the Cobb angle between the two groups (°, $\overline{x}\pm s$).

Group	Cobb angle				F	P
	Before surgery	1 day after surgery	6 months after surgery	1 year after surgery
PKP Group	14.86±6.62d	8.18±4.71a	8.36±4.78b	8.73±4.83c	63.679	<0.001
S-PKP Group	13.98±5.28d	7.87±3.84a	8.11±3.87b	8.46±3.96c	52.840	<0.001
F	0.342	0.083	0.055	0.059
P	0.561	0.774	0.816	0.809