Table 1 Demographics and clinical features of NHANES participants at baseline
From: Association between FEV1/FVC levels and all-cause mortality in the general population
Characteristic | Pre-bronchodilator FEV1/FVC | Total (N = 25501) | |
|---|---|---|---|
≥ 0.70 (N = 21871) | < 0.70 (N = 3630) | ||
Age — year | 43.8 ± 16.4 | 61.1 ± 14.7 | 46.3 ± 17.3 |
Male sex— no. (%) | 10,196 (46.6) | 2217 (61.1) | 12,413 (48.7) |
Body mass index — kg/m2 | 28.2 ± 6.4 | 26.8 ± 5.6 | 28.0 ± 6.3 |
Race— no. (%) | |||
White Non-Hispanic | 8717 (39.9) | 2282 (62.9) | 10,999 (43.1) |
Black Non-Hispanic | 5440 (24.9) | 708 (19.5) | 6148 (24.1) |
Mexican-American | 5221 (23.9) | 410 (11.3) | 5631 (22.1) |
Other | 2493 (11.4) | 230 (6.3) | 2723 (10.7) |
Smoking status— no. (%) | |||
Never smoker | 12,001 (54.9) | 1060 (29.2) | 13,601 (51.2) |
Current smoker | 5157 (23.6) | 1231 (33.9) | 6388 (25.0) |
Former smoker | 4713 (21.5) | 1339 (36.9) | 6052 (23.7) |
Comorbidity— no. (%) | |||
Congestive heart failure | 438 (2.0) | 182 (5.0) | 620 (2.4) |
Stroke | 393 (1.8) | 155 (4.3) | 548 (2.2) |
Asthma | 1900 (8.7) | 630 (17.4) | 2530 (9.9) |
Chronic bronchitis | 908 (4.2) | 401 (11.1) | 1309 (5.1) |
Emphysema | 124 (0.6) | 250 (6.9) | 374 (1.5) |
Cancer | 1251 (5.7) | 566 (15.6) | 1817 (7.1) |
Diabetes | 1783 (8.2) | 405 (11.2) | 2188 (8.6) |
Hypertension | 5730 (26.3) | 1439 (39.8) | 7169 (28.2) |
Chronic respiratory symptoms— no. (%) | |||
Chronic cough | 1270 (5.8) | 539 (14.8) | 1809 (7.1) |
Chronic phlegm | 1266 (5.8) | 552 (15.2) | 1818 (7.1) |
Wheezing | 2682 (12.3) | 907 (25.0) | 3589 (14.1) |
Shortness of breath | 2598 (11.9) | 831 (22.9) | 3429 (13.4) |
Pre-bronchodilator lung function | |||
FEV1, L | 3.15 ± 0.87 | 2.32 ± 0.82 | 3.03 ± 0.91 |
FEV1 percent predicted, % | 100.2 ± 14.2 | 80.9 ± 19.5 | 97.4 ± 16.5 |
FVC, L | 3.90 ± 1.06 | 3.68 ± 1.16 | 3.87 ± 1.08 |
FEV1/FVC | 0.81 ± 0.06 | 0.63 ± 0.08 | 0.78 ± 0.09 |