Table 2.

Complication Rates in the Matched Cohorts^a.

	MetS (N = 1903)		No MetS, Obeseb (N = 1903)		P	No MetS (N = 1903)		P
	n	%	n	%		n	%
Overall complications	461	24.2%	448	23.5%	.06	422	22.2%	.13
Wound complications	73	3.8%	51	2.7%	.045	50	2.6%	.035
Medical complications	413	21.7%	419	22.0%	.814	393	20.7%	.427
UTI	59	3.1%	47	2.5%	.237	32	1.7%	.004
Sepsis	34	1.8%	21	1.1%	.077	22	1.2%	.106
Readmission	141	7.4%	42	2.2%	<.001	88	4.6%	<.001
Long postoperative stay (≥5 days)	553	29.1%	455	23.9%	<.001	447	23.5%	<.001

Abbreviations: UTI, urinary tract infection; BMI, body mass index.

^aMatched for gender, race, age class, smoking status in the past year, chronic obstructive pulmonary disease, dyspnea, congestive heart failure in the past 30 days, chronic steroid use, bleeding disorder, anterior interbody fusion, posterior interbody fusion, 2 or more levels fused, and diagnosis.

^bControls also matched for BMI class (Obese I, 30-35 kg/m²; Obese II, 35-40 kg/m²; Obese III, ≥40 kg/m²).