Codebook NIAGADS data set for the Religious Orders Study and Memory and Aging Project. Rush Alzheimer's Disease Center Rush University Medical Center February 6th, 2013 Updated: August 20th, 2018 studyid description: study of enrollment value coding ROS Religious Orders Study MAP Memory and Aging Project niagadsid description: participant's 8-digit randomly assigned identifier sex description: participant's sex value coding 0 male 1 female prevad description: prevalent Alzheimer's Disease indicator of Alzheimer' Disease diagnosis at study baseline value coding 0 AD not present at study baseline 1 AD present at study baseline incad description: incident Alzheimer's Disease indicator of Alzheimer' Disease diagnosis after study baseline value coding 0 AD not present after study baseline 1 AD present after study baseline age_onset description: age at onset of Alzheimer's Disease diagnosis for incident cases The age at first diagnosis for Alzheimer's Disease Participants are evaluated yearly in ROS and MAP. For prevalent AD, diagnosis was done after the completion of the baseline visit. Participants are not asked to identify a date of prior diagnosis or onset of symptoms. Ages >90 are set to 90. age_base description: age at study baseline Ages >90 are set to 90. apoe description: apoe genotype value coding 22 E2E2 23 E2E3 24 E2E4 33 E3E3 34 E3E4 44 E4E4 empty apeo genotype not available autopsy description: autopsy performed 0 an autopsy has not been performed 1 an autopsy has been performed braak description: semiquantitative measure of neurofibrillary tangles value coding 0 0 1 I 2 II 3 III 4 IV 5 V 6 VI NA Braak scoring not applicable or not available for this participant race description: the self identified race of the participant value coding 1 white 2 Black, Negro, African-American 3 Native American, Indian 4 Eskimo 5 Aleut 6 Asian or Pacific Island ethnicity description: indicates if the participant is of Spanish/Hispanic/Latino origin value coding 0 no 1 yes