Dietary habits pre-MI (habitual diet) might affect post-MI survival. We tested the hypothesis of a “carry-over effect” of the pre-MI diet on post-MI mortality, adjusting for covariates from the period before MI. To examine the association between changes in dietary fiber in the period from before to after MI and survival, we also adjusted for changes in covariates during that period. For models with missing covariates, we tested three different methods (missing indicator, imputed with median, and assuming no change from before to after MI periods) with similar results, and therefore we present only the results using the missing indicator method. We also modeled fiber intake by nine subgroups of pre-MI (thirds) and post-MI fiber intake (thirds) and used the likelihood ratio test to examine the interaction between pre-MI and post-MI intake.