After multiple logistic regression analysis, the marker allele rs7316_G of the SFTPB is associated with increased risk for HP, p = 0.03, OR (95% CI) = 4.6 (1.3–22.0), whereas, male sex appears to be associated with decreased risk for HP, p < 0.01, OR = 0.02 (0.01–0.08). This evidence concerns the gene SFTPB and hypersensitivity pneumonitis.