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. Author manuscript; available in PMC: 2013 Aug 1.
Published in final edited form as: J Am Coll Surg. 2012 May 26;215(2):271–7.e3. doi: 10.1016/j.jamcollsurg.2012.03.008

Table 4.

Multivariable Analysis of 30-Day Major Adverse Complications

Characteristic Relative risk (95% CI) p Value
BMI (linear)* * 0.89
BMI (quadratic)* * 0.02
Inability to walk 200 feet (yes vs no) 1.57 (0.86–2.86) 0.14
History of DVT (yes vs no) 1.80 (1.12–2.91) 0.02
History of OSA (yes vs no) 1.33 (1.00–1.76) 0.049
Procedure <0.0001
LRYGB vs LAGB 3.60 (2.23–5.80) <0.0001
ORYGB vs LAGB 3.54 (1.86–6.74) 0.0001
Surgeon volume (cases per year) 0.95 (0.90–1.00) 0.07
Adverse intraoperative event (yes vs no) 1.84 (1.21–2.80) 0.01
*

Because BMI appears in the model as quadratic, the relative risk depends on the level of BMI and therefore a single relative risk could not be presented. BMI, body mass index; DVT, deep vein thrombosis; LAGB, laparoscopic adjusted gastric banding; LRYGB, laparoscopic Roux-en-Y gastric bypass; ORYGB, open Roux-en-Y gastric bypass; OSA, obstructive sleep apnea.