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| Group | FEV1 (Mean ± SD) | FVC (Mean ± SD) |
|---|---|---|
| Standing | 2.0 ± 0.5 | 2.5 ± 0.6 |
| Sitting | 1.9 ± 0.6 | 2.3 ± 0.6 |
| Side lying Right | 1.8 ± 0.5 | 2.3 ± 0.6 |
| Side Lying Left | 1.8 ± 0.5 | 2.2 ± 0.1 |
| Supine Lying | 1.7 ± 0.5 | 2.0 ± 0.5 |
Both FEV1 and FVC values were highest to lowest in Standing >Sitting>side lying on right side > side lying on left side > supine lying
