Anthropometry and spirometry
| Parameter | Normal group | Obese group | p Value |
|---|---|---|---|
| Age (year) | 38 (11) | 45 (13) | n.s. |
| Gender (m:f) | 5:4 | 4:5 | n.s. |
| Height (m) | 1.75 (0.10) | 1.65 (0.12) | 0.094 |
| Weight (kg) | 71.4 (12.5) | 124.9 (36.0) | 0.001 |
| BMI (kg/m2) | 23.2 (1.6) | 46.8 (17.2) | 0.001 |
| Neck circumference (cm) | 35.1 (2.4) | 43.4 (3.2) | <0.001 |
| Waist (cm) | 81.3 (9.3) | 122.8 (18.9) | <0.001 |
| Hip (cm) | 95.9 (5.6) | 127.8 (20.6) | <0.001 |
| Waist:hip ratio | 0.85 (0.07) | 0.96 (0.09) | 0.006 |
| MRC Dyspnoea Score (points) | 1.0 (0.0) | 2.4 (1.2) | 0.003 |
| FEV1 (L) | 4.4 (1.0) | 3.0 (1.5) | 0.033 |
| FEV1 (%predicted) | 119.6 (17.8) | 97.4 (24.7) | 0.044 |
| FVC (L) | 5.3 (1.3) | 3.7 (1.8) | 0.043 |
| FVC (%predicted) | 125.2 (17.3) | 96.8 (19.7) | 0.005 |
| FEV1/FVC (%) | 82.5 (4.2) | 79.6 (7.3) | 0.325 |
| Sagittal abdominal diameter/SAD (cm) | 21.1 (2.0) | 33.3 (7.7) | <0.001 |
| Delta SADinspiration (cm) | 2.7 (1.0) | 2.6 (0.3) | 0.649 |
| Double skinfold abdomen (mm) | 14.4 (5.3) | 47.2 (19.6) | <0.001 |
Demographics and body features of the obese and normal groups in mean (SD); the normal group included one subject who was slightly overweight (BMI 25.4 kg/m2). Spirometry was used as an entry criterion to confirm that obese subjects did not have significant obstructive airway disease.