Summary of demographic and respiratory data for pre bariatric surgery patients
| All subjects | Abnormal PFT's | OSA | Abnormal PFT's & OSA | No abnormalities | |
| n=59 | n=4 | n=23 | n=15 | n=17 | |
| Males | n=21 | n=2 | n=9 | n=7 | n=3 |
| Females | n=38 | n=2 | n=14 | n=8 | n=14 |
| Age (yrs) | 44.5±11.37 | 38.8±16.76 | 46.0±6.39 | 52±9.79 | 37.2±12.44 |
| BMI (Kg/m2) | 48.2±7.40 | 43.3±5.56 | 48.6±7.79 | 47.2±8.61 | 49.9±5.90 |
| SpO2 (%) | 96.7±3.36 | 97.8±1.50 | 96.3±4.52 | 95.8±3.10 | 97.6±1.32 |
| Spirometry | Normal=47 | Normal=3 | Normal=23 | Normal=5 | Normal=17 |
| Pattern | Obstructive=4 | Obstructive=0 | Obstructive=0 | Obstructive=3 | Obstructive=0 |
| Restrictive=8 | Restrictive=1 | Restrictive=0 | Restrictive=7 | Restrictive=0 | |
| FVC (%pred) | 96.05±16.27 | 86.25±4.76 | 103.83±10.89 | 75.80±7.88 | 105.71±11.94 |
| FRCpleth (%pred) | 76.50±16.76 | 67.00±22.73 | 82.14±15.37 | 75.85±22.24 | 71.94±10.80 |
| TLCO (%pred) | 100.34±14.49 | 89.50±17.33 | 104.65±13.76 | 94.33±15.00 | 102.35±12.37 |
| VA (%pred) | 89.00±13.45 | 78.75±5.12 | 94.61±10.95 | 75.40±10.08 | 95.82±10.14 |
| KCO (%pred) | 113.75±18.94 | 112.50±20.42 | 110.83±13.74 | 126.07±22.77 | 107.12±17.53 |
Data presented as n or mean±SD.
PFT's, pulmonary function tests; OSA, obstructive sleep apnoea; BMI, body mass index; SpO2, saturation of peripheral oxygen; FVC, forced vital capacity; % pred, percent predicted; FRCpleth, functional residual capacity measured by plethysmography; TLCO, Transfer factor of the lung for carbon monoxide; VA, alveolar volume; KCO, Transfer coefficient of carbon monoxide.