Table 1 Baseline characteristics and follow-up data of study participants
From: Longitudinal association between adiposity changes and lung function deterioration
|  | Total (N = 5011) | Men (n = 2255) | Women (n = 2756) | P-value |
|---|---|---|---|---|
Age, years | 54.0 ± 7.9 | 53.1 ± 7.5 | 54.8 ± 8.3 | < 0.001 |
Height, cm | 160.2 ± 8.6 | 167.4 ± 5.7 | 154.3 ± 5.5 | < 0.001 |
BMI, kg/m2 | 24.7 ± 2.9 | 24.5 ± 2.7 | 24.8 ± 3.1 | 0.005 |
Ever-smoker | 1727 (34.5) | 1659 (73.6) | 68 (2.5) | < 0.001 |
Smoking exposure, pack-year | 8.6 ± 15.6 | 18.7 ± 18.6 | 0.3 ± 2.7 | < 0.001 |
Residential area—rural | 2136 (42.6) | 838 (37.2) | 1298 (47.1) | < 0.001 |
Residential area—urban | 2875 (57.4) | 1417 (62.8) | 1458 (52.9) |  |
Adiposity index | ||||
 FMI, kg/m2 | 6.7 ± 2.3 | 5.3 ± 1.7 | 7.8 ± 2.2 | < 0.001 |
 Fat gaina | 3277 (65.4) | 1490 (66.1) | 1787 (64.8) | 0.284 |
 WHR | 0.91 ± 0.07 | 0.92 ± 0.06 | 0.90 ± 0.08 | < 0.001 |
 Abdominal obesityb | 3303 (66.0) | 1399 (62.2) | 2434 (88.5) | < 0.001 |
 WHR-increased participantsa | 1503 (30.0) | 676 (30.0) | 827 (30.0) | > 0.999 |
Lung function | ||||
 FVC, L | 3.57 ± 0.84 | 4.26 ± 0.63 | 3.00 ± 0.50 | < 0.001 |
 FVC, % predicted | 104.4 ± 12.5 | 101.8 ± 11.8 | 106.5 ± 12.7 | < 0.001 |
 FEV1, L | 2.86 ± 0.65 | 3.36 ± 0.52 | 2.45 ± 0.42 | < 0.001 |
 FEV1, % predicted | 112.9 ± 14.8 | 108.5 ± 13.2 | 116.6 ± 15.1 | < 0.001 |
 FEV1/FVC, % | 80.3 ± 4.8 | 78.9 ± 4.8 | 81.5 ± 4.5 | < 0.001 |
Measurement | ||||
 Follow-up duration, year | 8 (6–8) | 8 (6–8) | 8 (8–8) | 0.009 |
 Spirometry, times | 4 (3–5) | 4 (3–5) | 4 (3–5) | 0.166 |
 BIA, times | 5 (4–5) | 5 (4–5) | 5 (4–5) | 0.017 |