Table 1.
Baseline characteristics of Dongfeng-Tongji cohort participants according to normal lung function and poor lung function.
| Total | Lung Function | p Value | ||
|---|---|---|---|---|
| Normal Lung Function † | Poor Lung Function ‡ | |||
| N | 8398 | 5197 | 3201 | |
| Sex (Male, N, %) | 3561 (42.40) | 1903 (36.62) | 1658 (51.80) | <0.0001 * |
| Age (y, mean ± SD) | 63.51 ± 8.06 | 62.11 ± 7.74 | 65.79 ± 8.07 | <0.0001 * |
| BMI (kg/m2, mean ± SD) | 24.08 ± 3.22 | 24.13 ± 3.10 | 24.00 ± 3.41 | 0.0591 |
| Marriage (N, %) | 7459 (88.82) | 4676 (89.97) | 2783 (86.94) | <0.0001 * |
| Education | <0.0001 * | |||
| <9y (N, %) | 4820 (57.39) | 2793 (53.740) | 2027 (63.32) | |
| 9–12y (N, %) | 2532 (30.15) | 1693 (32.58) | 839 (26.21) | |
| >12y (N, %) | 1046 (12.46) | 711 (13.68) | 335 (10.47) | |
| Smoking | <0.0001 * | |||
| No smoking (N, %) | 6176 (73.54) | 4070 (78.31) | 2106 (65.79) | |
| Current smoking (N, %) | 1331 (15.85) | 677 (13.03) | 654 (20.43) | |
| Quit smoking (N, %) | 891 (10.61) | 450 (8.66) | 441 (13.78) | |
| Passive smoking (N, %) | 2495 (29.71) | 1629 (31.35) | 866 (27.05) | <0.0001 * |
| Drinking | <0.0001 * | |||
| No drinking (N, %) | 5846 (69.61) | 3705 (71.29) | 2141 (66.89) | |
| Current drinking (N, %) | 2178 (25.93) | 1312 (25.25) | 866 (27.05) | |
| Quit drinking (N, %) | 374 (4.45) | 180 (3.46) | 194 (6.06) | |
| Exercise (N, %) | 7606 (90.57) | 4718 (90.78) | 2888 (90.22) | 0.3926 |
| Hypertension (N, %) | 2771 (33.00) | 1576 (30.33) | 1195 (37.33) | <0.0001 * |
| Hyperlipemia (N, %) | 1549 (18.44) | 961 (18.49) | 588 (18.37) | 0.8885 |
| Diabetes (N, %) | 943 (11.23) | 530 (10.20) | 413 (12.90) | 0.0001 * |
* p < 0.05 is considered statistically significant. † Normal lung function: FVC% ≥ 80% and FEV1/FVC ≥ 70%. ‡ Poor lung function: FVC% < 80% and FEV1/FVC ≥ 70% or FEV1/FVC < 70%.