Visit Numbers in CoRRIE Reference Information

The purpose of this document is to reflect how visit numbers are used in CoRRIE by different studies

The ALERTT study is a non-treatment research study that focuses on tau tangles. The study determines how fast or slow tangles accumulate in different stages of Alzheimer’s disease and in normal brain aging. Learning how fast tangles change allows scientists to design more efficient clinical trials to speed up the pace of discovery for an effective treatment for AD.
The ALERTT study uses the visit number to represent which stage in the study the participant is in. the screening visit needs to be within 60 days of the Baseline visit.

The visits are labeled as follows:
(1) Screening :MRI, PIB PET Scan, Cognitive Testing (MMSE, CDR, ADAS-cog)
(2) Baseline: MK6240 PET Scan
(3) 6 Month Follow Up : MRI, MK6240 PET Scan, Cognitive Testing (MMSE, CDR, no ADAS)
(4) 12 Month Follow Up: MRI, MK6240 PET Scan, Cognitive Testing (MMSE, CDR, ADAS-cog)
(5) 24 Month Follow Up: MRI, MK6240 PET Scan, Cognitive Testing (MMSE, CDR, ADAS-cog)

The LEAD study is interested in understanding white matter and how it is affected by Alzheimer’s disease. The goal of the study is to identify early white matter changes to help better understand how AD spreads in the brain.
The study consist of three visits every 18 months and the following procedures are repeated at each visit:

  1. MRI
  2. Blood Draw
  3. Optional LP
The LEAD study uses the visit number to specify whether the visit is
(1) Baseline OR;
(2) or (3) Follow-ups

The goal of the Longitudinal Impact of Fitness and Exercise (LIFE) study is to obtain information about aerobic fitness and physical activity in order to better understand how aerobic fitness and physical activity might help promote healthy brain aging and delay the onset of clinical symptoms of AD in the future.
LIFE has two visits (Baseline and Follow-Up) two years apart. Each visit takes place over 1-2 days and includes the following:
  1. Vitals collection
  2. Two blood draws (pre- and post-exercise)
  3. A treadmill exercise test
  4. MRI scan
  5. Lumbar puncture
  6. Filling out Questionnaires
  7. Receiving an accelerometer (small device that records physical activity)
The LIFE study uses
(1) to represent all activities that occurred at Baseline, and
(2) to represent all activities that occurred at the Follow-Up visit
PET is a brain imaging research study that identifies how AD develops by imaging amyloid plaques and neurofibrillary tangles. The goal is to determine the agreement between the biomarkers and clinical diagnosis and to determine how far in advance of symptoms AD begins. Each participant comes in for a total of two times during the duration of the study, and the following scans are conducted at each visit:
  1. MK6240 PET
  2. PiB PET
The PET Study uses visit number to show which of the two visits the ppt came in for:
(1) to represent the first PET Visit, and,
(2) to represent the Second PET Visit, which is approximately 2 years following the first visit.

The PREDICT Study observes predictors of cognitive change from normal to early stages of MCI to dementia. The major aims of the study are to characterize the spatial burden of tau and amyloid and examine their interaction or cumulative effect on longitudinal cognitive decline.
Predict-2 is a continuation of Predict-1, therefore visits are labeled as Predict-2 Visit 1 and Predict-2 Visit 2.
The following procedures occur at each visit:
  1. MRI
  2. PiB PET
  3. MK6240 PET
  4. Optional LP
The Visit Numbers are used to represent the following:
(1) Baseline visit
(2) Follow Up/ 24 month visit

The SYNAPSE study uses PET brain scans to visualize neuronal synapse density, amyloid plaques, and neurofibrillary tangles; and examines whether AD pathology affects the quantity of synapses, and whether loss of synapses over time is associated with cognitive decline.
The following procedures occur at each visit:
  1. MRI (If not done with ADRC or WRAP in the past year)
  2. PiB PET
  3. MK6240 PET
  4. UCB-J PET
  5. Optional FDG PET
  6. Optional LP
The Synapse study uses the visit number to specify whether or not the visit is
(1) Baseline ,OR
(2) Follow-Up

These same visit numbers are used to represent all of the procedures done at Baseline or Follow-Up, even if these procedures occur on different days.
The Wisconsin Registry for Alzheimer’s Prevention (WRAP) study is a comprehensive data set that includes cognition, lifestyle, physical activity, biomarkers, genetics, and metabolism. The WRAP study consists of approximately 1,580 individuals, followed over time, to learn about biological, health and lifestyle factors that may affect the disease. WRAP has two different assessments- the entry level assessment and the subsequent assessments. Participants come in for an initial study visit, and then for a follow-up visit every 2 years. WRAP does not have a maximum number of visits a ppt can do during the duration of the visit, and the study plans to continue as long as funds permit.
Participation in WRAP includes:
  1. Cognitive Testing
  2. Blood Draw
  3. Medical Exam (when possible)
  4. Optional MRI
  5. Optional Lumbar Puncture
  6. Optional MK6240 PET
  7. Optional PiB PET
WRAP uses the visit numbers to represent the wave of the visit the participant is coming in for. Thus;
(1) Is used to represent the ppt’s first visit
(2) Is used to represent the ppt’s second visit
(3) Is used to represent the ppt’s third visit, and so on…

All WRAP biomarker visits do not have waves associated with them and the date the visit was conducted is used as the identifier instead.

Document History
Version DateEffective DateChange ReasonPrimary Author
Jun 17, 2020
OriginalCalanthea Mazoyo

Keywords:WRAP, ADRC, CoRRIE, Visit Numbers, Alertt, Lead, life, PET, Predict, Synapse   Doc ID:103127
Owner:Calanthea W.Group:Wisconsin Alzheimer’s Program
Created:2020-06-17 11:18 CDTUpdated:2020-06-23 17:41 CDT
Sites:Wisconsin Alzheimer’s Program
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