Figure 6. Forest plot of meta-analyzed results for the effect per minor allele of rs4905179 on FEV1 in ever-smokers, adjusted for sex, age, height, population stratification factors and the presence of PI S and Z alleles.
Studies based on population isolates with a high degree of cryptic relatedness are presented separately. Effect estimates of meta-analyses are shown with green diamonds. I2 is a measure of the heterogeneity between studies. Random effect meta-analyses are included if I2>0.5. Study weights (blue squares) correspond to fixed effect meta-analyses.