Associations between Haplotypes and Individual FTND Items.

ap-values for items 1 and 4 are from GLM tests in which the 4 levels of the item responses were taken to be an ordinal variable. For items 2, 3, 5 and 6, p-values are from logistic regression analyses. b“Inter” = the interaction between haplotype and age of onset, “All” = all subjects, “Early” = early onset smokers only, and “Late” = late onset smokers only. For GLM analyses, the p-value was obtained in a test across HA, HB, and HC. For logistic regression analyses, the p-value was for the HA vs. HC effect.