Figure 1.

Response flow chart. The following categories and definitions are used to classify participants and non-participants in the DCOG LATER-VEVO study: 1) “eligible subjects” are individuals registered in the DCOG LATER database who were confirmed as meeting the study eligibility criteria; 2) “participants” are those who consented to participate; 3) “non-participants” are individuals who declined participation verbally or in writing, who returned the envelope with study information unopened or who, at first indicated they were willing to participate but ultimately did not do so; 4) subjects are considered “lost to follow-up” if they were not located after intensive tracing efforts; and 5) individuals are classified as “pending” when they are actively being traced and recruited to participate.