Table 2 Characteristics of the participants at year 0 according to baseline BMI quartiles, the CARDIA study, 1985–96
From: Longitudinal association of body mass index with lung function: The CARDIA Study
| Â | Quartiles of Baseline BMI | |||
|---|---|---|---|---|
|  | Q1 <21.3 kg/m 2 | Q2 21.3–<23.4 kg/m 2 | Q3 23.4–<26.4 kg/m 2 | Q4 ≥ 26.4 kg/m 2 |
| Â | (n = 1117) | (n = 1191) | (n = 1215) | (n = 1211) |
Age (Years) | 24.3 (3.7) | 24.7 (3.5) | 25.1 (3.6) | 25.3 (3.5) |
FVC (L) | 4.02 (0.88) | 4.40 (0.96) | 4.58 (1.06) | 4.19 (1.05) |
FEV 1 (L) | 3.38 (0.68) | 3.64 (0.75) | 3.74 (0.82) | 3.44 (0.82) |
FEV 1 /FVC | 85 (7) | 83 (6) | 82 (6) | 83 (6) |
Physical activity (exercise units) | 395 (275) | 462 (299) | 459 (317) | 375 (290) |
Alcohol (mg/day) | 10.6 (19.0) | 12.9 (22.8) | 13.5 (21.0) | 11.4 (22.4) |
Education (% ≤ high school) | 39.8 | 37.6 | 35.6 | 42.6 |
Race (Blacks) (%) | 44.1 | 45.1 | 48.8 | 64.4 |
Sex (Male) (%) | 32.6 | 51.2 | 57.5 | 43.0 |
Prevalence of asthma at year 0 (%) | 9.0 | 9.2 | 10.9 | 10.2 |
Cumulative incidence of asthma during 10 years of follow-up (%) | 6.8 | 4.9 | 5.4 | 8.1 |
Prevalence of ex-smokers (%) | 14.2 | 13.0 | 15.1 | 12.1 |
Prevalence of current smoking ≤ 15 cigs/day (%) | 21.7 | 21.6 | 19.1 | 20.9 |
Prevalence of current smoking > 15 cigs/day (%) | 9.9 | 9.9 | 10.0 | 9.8 |