Table 1 Demographics and characteristics of the study population and those subjects excluded from the study*
From: A multivariate analysis of serum nutrient levels and lung function
Variable | Participants included N = 14120 | Participants excluded N = 5930 | ||
|---|---|---|---|---|
| Â | Mean (SD) | Number (%) | Mean (SD) | Number (%) |
Sex | Â | Â | Â | Â |
Males | Â | 6671 (47.3) | Â | 2730 (47.8) |
Females | Â | 7449 (52.8) | Â | 3200 (54.0) |
Age | 45.7 (19.6) | Â | 52.0 (22.8) | Â |
Smoking status | Â | Â | Â | Â |
Never | Â | 7390 (52.3) | Â | 2845 (48.1) |
Ex | Â | 3174 (22.5) | Â | 1633 (27.6) |
Current | Â | 3556 (25.2) | Â | 1434 (24.3) |
Pack Years** | 0 (0 to 12) | Â | 0 (0 to 14) | Â |
Race/Ethnicity | Â | Â | Â | Â |
Non-Hispanic White | Â | 5881 (41.6) | Â | 2602 (43.9) |
Non-Hispanic Black | Â | 3860 (27.3) | Â | 1626 (27.4) |
Mexican-American | Â | 3802 (26.9) | Â | 1504 (25.4) |
Other | Â | 577 (4.1) | Â | 198 (3.3) |
FEV1 (L) | 3.0 (0.9) | Â | 2.8 (1.0) | Â |
FVC (L) | 3.8 (1.1) | Â | 3.6 (1.1) | Â |
BMI (kg/m2) | 27.0 (5.8) | Â | 26.6 (6.2) | Â |
Cholesterol (mmol/l) | 5.3 (1.2) | Â | 5.3 (1.2) | Â |
Triglycerides (mmol/l) | 1.6 (1.3) | Â | 1.7 (1.3) | Â |
Energy intake (kcal) | 2102 (1068) | Â | 2006 (1039) | Â |
C-reactive protein (mg/dL)** | 0.21 (0.21 to 0.40) | Â | 0.21 (0.21 to 0.51) | Â |
Activity level | Â | Â | Â | Â |
None | Â | 2800 (19.8) | Â | 1886 (31.8) |
Low | Â | 5867 (41.6) | Â | 2012 (33.9) |
Moderate | Â | 4579 (32.4) | Â | 1741 (29.4) |
High | Â | 874 (6.2) | Â | 291 (4.9) |