This study will retrospectively compare the rates of pulmonary complications following LAP-BAND and LSG surgeries. The effect of the surgery on the comorbid conditions of type 2 diabetes mellitus (DM), hypertension (HTN), hyperlipidemia (LPD), degenerative joint disease (DJD), gastroesophageal reflux disease (GERD), obstructive sleep apnea (OSA), and asthma in the two subpopulations will also be assessed.