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. Author manuscript; available in PMC: 2024 Apr 26.
Published in final edited form as: J Clin Anesth. 2021 Aug 2;75:110475. doi: 10.1016/j.jclinane.2021.110475

Table 2.

Univariable analyses of obesity status and intraoperative and postoperative outcomes, length of stay and discharge destination (N = 1262).

Intraoperative complications
 Postoperative complications
 Length of stay
 Non-home discharge destination
 
 Mean ± SD: 0.078 ± 0.079
 Mean ± SD: 0.23 ± 0.34
 Mean ± SD: 5.02 ± 18.79
 % Non-home discharge: 38.83%
Method
 Poisson
 Poisson
 Negative Binomial
 Logistic
IRR 95% CI P-value IRR 95% CI P-value IRR 95% CI P-value OR 95% CI P-value
Year (2009 and after) 1.47 [0.96,2.33] 0.09 0.90 [0.71,1.15] 0.40 0.78 [0.73,0.84] <0.001 1.03 [0.82,1.31] 0.78
Age 1.00 [0.97,1.03] 0.94 1.02 [1.00,1.04] 0.10 1.00 [1.00,1.01] 0.56 1.08 [1.06, 1.1] <0.001
Gender (Female) 0.97 [0.65,1.44] 0.88 0.96 [0.76,1.21] 0.74 1.19 [1.11, 1.28] <0.001 1.79 [1.43, 2.26] <0.001
Race (White) 0.98 [0.55,1.95] 0.96 0.70 [0.51,0.98] 0.03 0.90 [0.80,1.00] 0.05 0.71 [0.49, 1.01] 0.055
Charlson 1.05 [0.89,1.22] 0.51 1.07 [0.98,1.17] 0.13 1.07 [1.04, 1.07] <0.001 1.21 [1.10, 1.34] <0.001
ASA Class (≥3) 1.45 [0.98,2.15] 0.07 1.93 [1.52,2.44] <0.001 1.30 [1.21, 1.39] <0.001 2.17 [1.73, 2.74] <0.001
Surgery site
Hipa
Knee 0.89 [0.51,1.52] 0.66 1.19 [0.82,1.73] 0.35 1.03 [0.93, 1.14] 0.62 0.91 [0.66, 1.26] 0.58
Spine 0.75 [0.47,1.20] 0.22 1.55 [1.15,2.13] 0.005 1.33 [1.23, 1.45] <0.001 0.64 [0.48, 0.84] 0.001
Obesity Status
Nonobeseb
Obesity Class 1c 1.17 [0.72,1.84] 0.52 1.23 [0.93,1.62] 0.14 1.05 [0.97, 1.15] 0.22 1.21 [0.91, 1.59] 0.18
Obesity Class 2-3d 1.20 [0.65,2.05] 0.53 1.60 [1.15,2.13] 0.004 1.16 [1.05, 1.29] 0.004 2.05 [1.47, 2.86] <0.001

Abbreviations: ASA, American Society of Anesthesiologists Physical Status Classification; IRR, Incident Risk Ratio; CI, Confidence Interval; OR, Odds Ratio; SD, standard deviation.

a

Reference group

b

Reference group, World Health Organization classification of nonobese: Body Mass Index (BMI) < 30 kg/m2.

c

World Health Organization classification of obesity class 1: 30 kg/m2 ≤ BMI < 35 kg/m2.

d

World Health Organization classification of obesity class 2-3: BMI ≥ 35 kg/m2.