Table 2– Relative change (reduction in % and 95% CI) of the expected lung function outcome due to cooking with gas
Basic modelAdjusted model
All datasetsExcluding AustriaExcluding North America
FVC0.6 (0.2–1.1)0.5 (0.1–0.8)0.8 (0.1–1.5)0.5 (0.0–1.1)
 p-heterogeneity0.3040.40160.2550.216
FEV10.7 (0.1–1.2)0.5 (0.1–0.8)0.9 (0.1–1.6)0.5 (-0.1–1.2)
 p-heterogeneity0.2140.4840.2450.153
PEF0.8 (-0.2–1.9)0.6 (-0.4–1.5)0.6 (-0.8–2.0)0.7 (-0.4–1.7)
 p-heterogeneity0.0620. 1880.0770.100
MMEF0.4 (-0.7–1.4)0.1 (-0.9–1.1)1.0 (-0.6–2.6)0.1 (-1.0–1.3)
 p-heterogeneity0.3960.5700.410.368
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-heterogeneity0.4110.4360.5140.412
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-heterogeneity0.4370.6800.3210.521
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-heterogeneity0.0970.6050.0970.142
  • 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.