Figure 1.

Completion of the follow-up interviews over time. Rates are based on the number of non-decedents from the prior interview, which is provided at the top of each bar. A diminishing number of participants who were enrolled later in the study were scheduled for follow-up interviews beyond 24 months. As described in the Methods, participants had to be reconsented at 36 months. A surrogate death interview was completed for 299 (76.7%) of the 390 decedents who had not completed the final follow-up interview, been lost to follow-up, or withdrawn partially from the study. The designation, “Unable to contact, lost to follow-up”, was made retrospectively at the end of the study.