Table 2 Distribution of basic predictor variables in the reference sample, SAPALDIA cross-sectional study, 1991
From: Reference values for methacholine reactivity (SAPALDIA study)
Men (n = 612) | Women (n = 955) | Entire reference sample (n = 1567) | |
|---|---|---|---|
<30 yrs | 31.7% | 20.8% | 25.1% |
30–40 yrs | 24.8% | 20.5% | 22.2% |
40–50 yrs | 25.5% | 27.9% | 26.9% |
≥50 yrs | 18.0% | 30.8% | 25.8% |
Height, mean (SD) | 176.1 (6.7) | 163.5 (6.5) | 168.4 (9.0) |
Weight, mean (SD) | 75.2 (10.2) | 61.6 (10.6) | 66.9 (12.4) |
FEV1, mean (SD) | 4.33 (0.67) | 3.10 (0.54) | 3.58 (0.84) |
PD20 prevalence* | 4.4% | 14.6% | 10.6% |