Lung function according to ATP binding cassette member 3 (ABCA3) E292V, surfactant protein-B 121ins2, and α
-antitrypsin ZZ genotypes in the Copenhagen City Heart Study and Copenhagen General Population Study combined, stratified for smoking status. Values are mean and standard error. P-values are by Student’s t-test. Lung function according to surfactant protein-B 121ins2 heterozygosity and α
-antitrysin ZZ homozygosity serve as positive controls. Numbers of individuals with surfactant protein-B 121ins2 heterozygosity and α
-antitrypsin ZZ homozygosity differ slightly from the number of individuals with an ABCA3 E292V genotype due to different number of study subjects available for analysis within the study period.