Table 5.

Complications of imbalance vs. balance groups.

Mean (+/−SD)	Imbalance	Balance	p-Value
re-operation	29.2%	30.2%	0.88
major complication	23.6%	30.2%	0.28
fusion achieved after 2 years	60.4%	64.2%	0.57
PJK *	26.4%	14.2%	0.03
PJF	34.00%	17.92%	0.01
implant-related complications	47.2%	34.0%	0.05

* Logistic regression (controlling for age, baseline sagittal parameters, PI-LL correction, and CCI): imbalance patients had OR = 2.2 of sustaining PJK (p = 0.03, r² = 0.024).