Table 3. Estimated pelvic obliquity trajectories and the effects of age and surgery on trajectory, measured as percent change.

Trajectory parameter	Estimate	95% CI	P value
Predicted first measurement for 9 yr old.	3.33	(2.02, 5.49)	<0.001
Percent change per year older at baseline	2%	(-2%, 6%)	0.26
Percent change per year of follow-up	14%	(8%, 21%)	<0.001
Percent change immediately after surgery	-21%	(-37%, -1%)	0.04
Percent change per year in post-op period (P value compared to pre-op change per yr)	14%	(13%, 15%)	0.94