|
Demographics and characteristics of the study population and those subjects excluded from the study* |
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| Variable |
Participants included N = 14120 |
Participants excluded N = 5930 |
||
|
|
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| Mean (SD) |
Number (%) |
Mean (SD) |
Number (%) |
|
|
|
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| Sex |
||||
| Males |
6671 (47.3) |
2730 (47.8) |
||
| Females |
7449 (52.8) |
3200 (54.0) |
||
| Age |
45.7 (19.6) |
52.0 (22.8) |
||
| Smoking status |
||||
| Never |
7390 (52.3) |
2845 (48.1) |
||
| Ex |
3174 (22.5) |
1633 (27.6) |
||
| Current |
3556 (25.2) |
1434 (24.3) |
||
| Pack Years** |
0 (0 to 12) |
0 (0 to 14) |
||
| Race/Ethnicity |
||||
| Non-Hispanic White |
5881 (41.6) |
2602 (43.9) |
||
| Non-Hispanic Black |
3860 (27.3) |
1626 (27.4) |
||
| Mexican-American |
3802 (26.9) |
1504 (25.4) |
||
| Other |
577 (4.1) |
198 (3.3) |
||
| FEV1 (L) |
3.0 (0.9) |
2.8 (1.0) |
||
| FVC (L) |
3.8 (1.1) |
3.6 (1.1) |
||
| BMI (kg/m2) |
27.0 (5.8) |
26.6 (6.2) |
||
| Cholesterol (mmol/l) |
5.3 (1.2) |
5.3 (1.2) |
||
| Triglycerides (mmol/l) |
1.6 (1.3) |
1.7 (1.3) |
||
| Energy intake (kcal) |
2102 (1068) |
2006 (1039) |
||
| C-reactive protein (mg/dL)** |
0.21 (0.21 to 0.40) |
0.21 (0.21 to 0.51) |
||
| Activity level |
||||
| None |
2800 (19.8) |
1886 (31.8) |
||
| Low |
5867 (41.6) |
2012 (33.9) |
||
| Moderate |
4579 (32.4) |
1741 (29.4) |
||
| High |
874 (6.2) |
291 (4.9) |
||
|
* Data is presented for the population where data is available. Excluded participants had missing data on a priori confounders and/or serum markers ** Data presented as Median and IQR | ||||
McKeever et al. Respiratory Research 2008 9:67 doi:10.1186/1465-9921-9-67 |
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