TABLE 2.
Lung function variables stratified by obesity, central obesity and level of leisure time physical activity
| Variable | Total (n=22 743) | Obesity | Central obesity | Leisure time physical activity | |||||
| No# (n=18 550) | Mild¶ (n=3454) | Morbid+ (n=128) | No (n=13 412) | Yes§ (n=9327) | High (n=4012) | Medium (n=16 805) | Low (n=1326) | ||
| FEV1 % predicted | 100 (91–111) | 101 (98–112) | 98 (88–109) | 88 (80–100) | 102 (93–112) | 99 (88–109) | 103 (94–113) | 101 (91–111) | 97 (86–107) |
| FVC % predicted | 100 (91–111) | 101 (92–111) | 95 (86–106) | 85 (78–96) | 102 (93–112) | 97 (87–107) | 103 (94–113) | 100 (90–110) | 96 (85–106) |
| FEV1/FVC % predicted | 100 (96–110) | 100 (95–110) | 103 (98–108) | 104 (75–85) | 100 (95–110) | 100 (97–110) | 101 (95–105) | 101 (96–106) | 102 (95–107) |
| FEV1 z-score | 0.06 (−0.62 to 0.77) | 0.10 (−0.56 to 0.80) | −0.12 (−0.84 to 0.60) | −0.82 (−1.37 to −0.01) | 0.14 (−0.50 to 0.86) | −0.08 (−0.79 to 0.61) | 0.19 (−0.42 to 0.91) | 0.04 (−0.64 to 0.75) | −0.22 (−0.94 to 0.52) |
| FVC z-score | 0.00 (−0.64 to 0.70) | 0.07 (−0.56 to 0.76) | −0.31 (−0.97 to 0.39) | −1.05 (−1.58 to −0.22) | 0.14 (−0.48 to 0.84) | −0.21 (−0.86 to 0.48) | 0.20 (−0.43 to 0.88) | −0.02 (−0.65 to 0.67) | −0.31 (−1.03 to 0.45) |
| FEV1/FVC z-score | 0.06 (−0.57 to 0.64) | 0.02 (−0.62 to 0.58) | 0.30 (−0.31 to 0.86) | 0.45 (−0.28 to 0.90) | −0.01 (−0.65 to 0.56) | 0.18 (−0.45 to 0.74) | 0.03 (−0.64 to 0.58) | 0.07 (−0.55 to 0.63) | 0.14 (−0.62 to 0.77) |
Data are presented as median (IQR). FEV1: forced expiratory volume in 1 s; FVC: forced vital capacity; IQR: interquartile range. #: body mass index (BMI) <30 kg·m−2; ¶: BMI 30–39 kg·m−2; +: BMI ≥40 kg·m−2; §: waist circumference (WC) ≥88 cm for women and ≥102 cm for men.