Basic model | Adjusted model | |||
All datasets | Excluding Austria | Excluding North America | ||
FVC | 0.6 (0.2–1.1) | 0.5 (0.1–0.8) | 0.8 (0.1–1.5) | 0.5 (0.0–1.1) |
p-heterogeneity | 0.304 | 0.4016 | 0.255 | 0.216 |
FEV1 | 0.7 (0.1–1.2) | 0.5 (0.1–0.8) | 0.9 (0.1–1.6) | 0.5 (-0.1–1.2) |
p-heterogeneity | 0.214 | 0.484 | 0.245 | 0.153 |
PEF | 0.8 (-0.2–1.9) | 0.6 (-0.4–1.5) | 0.6 (-0.8–2.0) | 0.7 (-0.4–1.7) |
p-heterogeneity | 0.062 | 0. 188 | 0.077 | 0.100 |
MMEF | 0.4 (-0.7–1.4) | 0.1 (-0.9–1.1) | 1.0 (-0.6–2.6) | 0.1 (-1.0–1.3) |
p-heterogeneity | 0.396 | 0.570 | 0.41 | 0.368 |
MEF25% | 0.1 (-1.2–1.5) | -0.1 (-1.5–1.2) | 1.2 (-0.9–3.2) | -0.1 (-1.5–1.3) |
p-heterogeneity | 0.411 | 0.436 | 0.514 | 0.412 |
MEF50% | 0.7 (-0.3–1.7) | 0.4 (-0.6–1.5) | 0.8 (-1.0–2.6) | 0.3 (-0.7–1.4) |
p-heterogeneity | 0.437 | 0.680 | 0.321 | 0.521 |
MEF75% | 0.3 (-1.6–2.2) | -0.6 (-2.0–0.8) | 0.3 (-1.6–2.2) | 0.1 (-1.7–1.9) |
p-heterogeneity | 0.097 | 0.605 | 0.097 | 0.142 |
FVC: forced vital capacity; FEV1: forced expiratory volume in 1 s; PEF: peak expiratory flow; MMEF: maximum mid-expiratory flow; MEFx%: maximal expiratory flow at x% of FVC. Coefficient estimates are from the basic (i.e. only adjusted for age, sex, height, weight, technician and/or instrument, season and study area) and from the adjusted model (i.e. also adjusted for the potential confounders recent respiratory infections, current smoking exposure, smoking during pregnancy, maximal parental education, mould, and pet ownership). Significant data (p<0.05) are shown in bold.