Table 4.

Results of multivariate analyses

Outcome/associated factor	Odds ratio (95% CI)	p value
Any adverse event
BMI-for-age ≥ 95th percentile versus 5th–95th percentiles	3.31 (1.43–7.65)	0.005
Serious adverse event
BMI-for-age ≥ 95th percentile versus 5th–95th percentiles	3.46 (1.32–9.09)	0.012
Length of stay more than 6 days
≥ 13 levels instrumented versus 7–12 levels	2.00 (1.11–3.61)	0.021
Operative time ≥ 365 minutes	2.57 (1.39–4.76)	0.003
Readmission
Any inpatient complication	180.44 (35.47–917.97)	< 0.001