Table 3

Readmission rates among congenital scoliosis patients who underwent Posterior fusion by patient factors.

Patient Factors	Readmission Rate, %	Bivariate Analyses		Multivariate Analysis
Patient Factors	Readmission Rate, %	OR	P	OR	P
Overall	5.27
Age, y			0.3313
0–4	9.84	2.15
5–9	4.58	0.97
10–14	4.73	Ref
15–19	5.03	1.07
Sex			0.5989
Men	5.75	Ref
Women	4.91	0.85
Body mass index group			0.1637		0.2145
Underweight (<18.5 kg/m²)	5.51	1.37		1.347
Nonobese (18.5–29.9 kg/m²)	4.08	ref		ref
Obese I (30.0–34.9 kg/m²)	11.9	3.18		3.217
Obese II (35.0–39.9 kg/m²)	14.29	3.92		3.815
Obese III (≥40 kg/m²)	0	<0.001		<0.001
Nutritional support	10.2	2.181	0.1192	1.856	0.2935
Esophageal/gastric/intestinal disease	6.12	1.2	0.6873
Ionotropic support during surgery	0	<0.001	0.99
Seizure disorder	8.57	1.737	0.3773
Tracheostomy	7.69	1.51	0.6955
Chronic steroid use	0	<0.001	0.9892
Developmental delay	7.94	1.844	0.0647	1.492	0.2867
Previous cardiac surgery	4.08	0.741	0.5765
Chronic lung disease	3.45	0.625	0.5232
Structural central nervous system abnormality	6.01	1.201	0.6107
Asthma	5.62	1.079	0.8762
Oxygen support	12.5	2.65	0.2082
Hematologic disease	10	2.047	0.3475
Structural pulmonary/airway abnormality	2.2	0.375	0.1808	0.221	0.0492
Blood transfusions within 48 h prior to surgery	25	6.116	0.1202	5.719	0.1588
American Society of Anesthesiologists Score			0.5009
1–2	4.8	ref
>2	5.87	1.235
Fusion to pelvis	16.39	4.29	0.0002	3.241	0.0075
Osteotomy	5.91	1.197	0.5851
Levels fused			0.112		0.9731
<7	4.3	ref		ref
7–12	4.28	0.993		1.103
>12	8.1	1.958		1.051
Length of stay >4 d, median	8.96	2.838	0.0011	2.413	0.0103