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Table 2 Pulmonary function and maximal ventilatory pressures before and after bariatric surgery

From: Obstructive sleep apnea and pulmonary function in patients with severe obesity before and after bariatric surgery: a randomized clinical trial

Variables (n = 16) Control (n = 36) Pre surgery After surgery (n = 16) p
     (after vs. pre)
FVC (L) 3,06 ± 0,47 2,96 ± 0,63 3,33 ± 0,80 0,002**
FVC (% of pred.) 102 ± 21,46 97,75 ± 18,65 110,50 ± 16,95 0,016**
FEV1 (L) 2,45 ± 0,34 2,38 ± 0,52 2,71 ± 0,72 0,003**
FEV1 (%) 97,57 ± 20,92 91,92 ± 21,24 107,00 ± 20,23 0,022**
FEV1/FVC (L) 0,79 ± 0,08 0,80 ± 0,07 0,81 ± 0,07 ns
FEV1/FVC (% of pred.) 79,43 ± 8,06 80,08 ± 7,28 81,50 ± 7,44 ns
MIP (cmH2O)     
  Female 53,61 ± 17,63 52,67 ± 18,91 83,75 ± 10,78 0,002*
  Male 62,31 ± 21,32 61,18 ± 23,11 87,54 ± 9,83 0,004*
MEP (cmH2O)     
  Female 52,37 ± 15,69 53,58 ± 16,88 80,50 ± 13,31 0,001*
  Male 62,31 ± 17,25 60,65 ± 18,36 84,96 ± 7,86 0,002*
  1. FEV1, Forced expiratory volume in the first second; FVC, Forced vital capacity; MEP, Maximal expiratory pressure; MIP, Maximal inspiratory pressure; * p derived by paired Student’s t test; ** p derived by Wilcoxon Test.