Table 2.
Effects of abdominal obesity and body positions on lung function.
| Parameters | Groups | Body positions | Interaction effects (F3, 36) p values | |||
|---|---|---|---|---|---|---|
| Sitting (SIT) | Sitting with back support (SWB) | Fowler's position (FW) | Supine (SUP) | |||
| Lung function | ||||||
| FVC (L) | Healthy control | 4.53 ± 0.12 | 4.51 ± 0.11 | 4.25 ± 0.11#,δ | 4.16 ± 0.11#,δ | 0.001 |
| Abdominal obesity | 3.94 ± 0.12∗ | 3.98 ± 0.11∗ | 3.76 ± 0.11∗,#,δ | 3.65 ± 0.11∗,#,δ | 0.001 | |
|
| ||||||
| FEV1 (L) | Healthy control | 3.75 ± 0.10 | 3.73 ± 0.11 | 3.54 ± 0.11#,δ | 3.39 ± 0.12#,δ | 0.001 |
| Abdominal obesity | 3.23 ± 0.10∗ | 3.20 ± 0.11∗ | 2.91 ± 0.11∗,#,δ | 2.69 ± 0.12∗,#,δ,† | 0.001 | |
|
| ||||||
| FEV1/FVC (%) | Healthy control | 82.78 | 82.67 | 83.29 | 81.49 | |
| Abdominal obesity | 81.98∗ | 80.40∗ | 77.39∗,#,δ | 73.70∗,#,δ,† | 0.001 | |
|
| ||||||
| PEFR (L) | Healthy control | 6.49 ± 0.28 | 6.25 ± 0.25 | 6.12 ± 0.25 | 5.74 ± 0.23#,δ,† | 0.001 |
| Abdominal obesity | 5.07 ± 0.28∗ | 5.21 ± 0.25∗ | 5.02 ± 0.25∗ | 4.54 ± 0.23∗,#,δ,† | 0.001 | |
|
| ||||||
| ERV (L) | Healthy control | 1.12 ± 0.02 | 1.11 ± 0.37 | 0.95 ± 0.03 | 0.90 ± 0.03 | |
| Abdominal obesity | 0.94 ± 0.02∗ | 0.92 ± 0.04∗ | 0.77 ± 0.03∗ | 0.65 ± 0.03∗ | 0.001 | |
∗Significant difference between control and abdominal obesity groups (p < 0.001); #significant difference compared with sitting position in the same group; δsignificant difference compared with sitting with back support in the same group (p < 0.001), †significant difference compared with Fowler's position in the same group (p < 0.001).