Baseline characteristics of the study participantsa.

APOE = apolipoprotein E; BMI = body mass index; BP = blood pressure; BSIT = Brief Smell Identification Test; eGFR = estimated glomerular filtration rate; GDS = Geriatric Depression Scale; NESB = non-English-speaking background.aData are presented as No. (%), unless otherwise indicated.bMaximum n for the whole sample is 889; minimum is 820 (homocysteine).cFor categorical factors, d is the difference in mean age of those meeting the factor versus those not meeting the factor. For continuous factors, r is the correlation coefficient with age.*p2 tests) or age associations (t- tests or Pearson correlations).