Fasting status is reported at the time of blood draw. Participants are asked to report the time of their last meal. If a participant is unable to answer the question, a nurse or caregiver's response is recorded, if available. Participants who are impaired and cannot answer questions clearly are marked as "don't know." A participant is considered fasting if the last meal was consumed at least 8 hours prior to the time of blood draw.

Note: "Don't know" is coded as a missing value.