Identical procedures and instructions were followed for the 5- and 10-year laboratory testing re-examination phases. For ethical reasons, participants with major medical or psychiatric contraindications (n=3), pregnancy or nursing (n=3), or alcohol abstinence (n=3) were not eligible for the final 10-year re-examination sessions. As nearly half (49%) of the sample no longer resided in the area, transportation to Chicago, lodging accommodations, and other per diem expenses were provided, as warranted. Re-examination sessions were scheduled for the same month as initial testing; the mean (±SD) interval from participants’ initial to year 5 sessions was 61±3.0 months and to year 10 sessions was 122±3.7 months.
