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Alzheimer's Disease Assessment Scale Cognitive Subscale

407 Shared Subjects

Clinical Assessments

View Change History
Query Element Name Data Type Size Required Description Value Range Notes Aliases
subjectkey GUID Required The NDAR Global Unique Identifier (GUID) for research subject NDAR*
src_subject_id String 20 Required Subject ID how it's defined in lab/project catieid
interview_date Date Required Date on which the interview/genetic test/sampling/imaging/biospecimen was completed. MM/DD/YYYY
interview_age Integer Required Age in months at the time of the interview/test/sampling/imaging. 0 :: 1260 Age is rounded to chronological month. If the research participant is 15-days-old at time of interview, the appropriate value would be 0 months. If the participant is 16-days-old, the value would be 1 month.
sex String 20 Required Sex of subject at birth M;F; O; NR M = Male; F = Female; O=Other; NR = Not reported gender
Query adas01a Integer Recommended World Recall Trial 1 0::10 number of errors
Query adas01b Integer Recommended World Recall Trial 2 0::10 number of errors
Query adas01c Integer Recommended World Recall Trial 3 0::10 number of errors
Query adas02 Integer Recommended Naming Objects 0::5 0 = 0-2 items, 1 = 3-5 items, 2 = 6-8 items, 3 = 9-11 items, 4 = 12-14 items, 5 = 15-17 items
Query adas03 Integer Recommended Commands Score 0::5 1 = 1 command incorrect / 4 commands correct 2 = 2 commands incorrect / 3 commands correct 3 = 3 commands incorrect / 2 commands correct 4 = 4 commands incorrect / 1 command correct 5 = all 5 commands incorrect
Query adas04 Integer Recommended Constructional Praxis Score 0::5 0 = all 4 drawn correctly 1 = 1 form drawn incorrectly 2 = 2 forms drawn incorrectly 3 = 3 forms drawn incorrectly 4 = 4 forms drawn incorrectly 5 = no figures, scribbles; parts of forms; words
Query adas05 Integer Recommended Ideational Praxis Score 0::5 0 = all components performed correctly 1 = failure to perform 1 component 2 = failure to perform 2 components 3 = failure to perform 3 components 4 = failure to perform 4 components 5 = failure to perform 5 components
Query adas06 Integer Recommended Orientation Score 0::8 Number of incorrect responses
Query adas07a Integer Recommended World Recognition Trial 1 0::12 number of errors
Query adas07b Integer Recommended World Recognition Trial 2 0::12 number of errors
Query adas07c Integer Recommended World Recognition Trial 3 0::12 number of errors
Query adas08 Integer Recommended Remembering Test Instructions 0::5 0 = patient never needs reminders of instructions 1 = very mild � forgets once 2 = mild � must be reminded 2 times 3 = moderate � must be reminded 3 or 4 times 4 = moderately severe � must be reminded 5 or 6 times 5 = severe � must be reminded 7 or more times
Query adas09 Integer Recommended Spoken Language Ability 0::5 0 = no instances where it is difficult to understand patient 1 = very mild � one instance of lack of understandability 2 = mild � patient has difficulty less than 25% of the time 3 = moderate � patient has difficulty less than 25-50% of the time 4 = moderately severe � patient has difficulty less than 50% of the time 5 = severe � one or two word utterance; fluent, but empty speech; mute
Query adas10 Integer Recommended Word-Finding Difficulty in Spontaneo 0::5 0 = no evidence of word finding difficulty in spontaneous speech 1 = very mild � 1 or 2 instances, not clinically significant 2 = mild � noticeable circumlocution or synonym substitution 3 = moderate � loss of words without compensation on occasion 4 = moderately severe � frequent loss of words without compensation 5 = severe � nearly total loss of content of words; speech sounds empty; 1-2 word utterances
Query adas11 Integer Recommended Comprehension of Spoken Language 0::5 0 = no evidence of poor comprehension 1 = very mild � 1 or 2 instances of misunderstanding 2 = mild � 3-5 instances of misunderstanding 3 = moderate � requires several repetitions and rephrasing 4 = moderately severe � patient only occasionally responds correctly; i.e., yes/no 5 = severe � patient rarely responds to questions appropriately, not due to poverty of speech
Query adas12 Integer Recommended Concentration/ Distractibility 0::10 0 = none, no evidence of poor concentration or distractibility 1 = very mild, one instance of poor concentration 2 = mild, 2-3 instances of poor concentration/distractibility; signs of restlessness and inattentiveness 3 = moderate, 4-5 instances during interview 4 = moderately severe, poor concentration/distractibility throughout much of interview 5 = severe, extreme difficulty in concentration and extremely distractible, unable to complete tasks; 6 = Is goal-oriented, can maintain interest in tasks; 7 = Slightly distractible, but is goal-oriented and can finish tasks with minimal pressure; 8 = Quite distractible; finishes tasks only with considerable pressure; shows minimal goal-oriented behavior; 9 = Extremely distractible, cannot sustain attention for more than a few seconds, regardless of external pressure; 10 = Never starts or gets involved in anything presented to him and therefore cannot be rated.
Query adas13 Integer Recommended Number Cancellation: 0::40 number of targets hit
Query adas14 Integer Recommended Executive Function(maze) 0::240 in seconds
Query adas_ts Float Recommended ADAS Total Score 0::5000 Created variable with 20% missing data rule applied: First, we created 2 intermediate variables: M_RECALL (mean number of words not recalled in the 3 trials): Average of (10-ADAS01A), (10-ADAS01B), (10- ADAS01C). M_RECOG (mean number of words not recognized in the 3 trials): Average of ADAS07A, ADAS07B, ADAS07C. Total score is calculated as follows: Sum of M_RECALL, ADAS02, ADAS03, ADAS04, ADAS05, ADAS06, M_RECOG, ADAS08, ADAS09, ADAS10, ADAS11
Query visitid Integer Recommended MetaTrial Visit ID System variable: unique code for each type of visit -use to merge files
Query visit String 60 Recommended Visit name
Query visnum Float Recommended Numeric Visit Number -1.5 = Pre-Screening; -1 = Screening; 0 = Baseline; ## = Visit ## (from 1 to 10); Whole numbers = standard monthly visits; #.001 - #.009 = Unscheduled; #.1 = End of Phase 1; #.2 = End of Phase 2; #.3 = End of Phase 3; #.4 = End of Open Choice Phase; #.5 = End of Study; #.6 = Genetic Analysis; 1000=all visits
Query phase_ct String 20 Recommended Current Phase. Phase patient was in at the time of the assessment Phase 4 refers to the follow-up phase. Pre-Rand; Phase 1/1A; Phase 2; Phase 3; Phase 4; Phase 1B; Open-Choice Phase; Screening; Phase 1
Query last1 Integer Recommended Flag Last Phase 1/1A Visit 1=Yes for all records meeting this criteria
Query base1 Integer Recommended Flag Baseline Phase 1/1A Visit 1=Yes for all records meeting this criteria
Query base_ts Float Recommended Baseline Total Score Scare at Phase 1 baselline
Query c_ts Float Recommended Changed from Baseline ADAS Total Score Change from Phase 1 baseline
Data Structure

This page displays the data structure defined for the measure identified in the title and structure short name. The table below displays a list of data elements in this structure (also called variables) and the following information:

  • Element Name: This is the standard element name
  • Data Type: Which type of data this element is, e.g. String, Float, File location.
  • Size: If applicable, the character limit of this element
  • Required: This column displays whether the element is Required for valid submissions, Recommended for valid submissions, Conditional on other elements, or Optional
  • Description: A basic description
  • Value Range: Which values can appear validly in this element (case sensitive for strings)
  • Notes: Expanded description or notes on coding of values
  • Aliases: A list of currently supported Aliases (alternate element names)
  • For valid elements with shared data, on the far left is a Filter button you can use to view a summary of shared data for that element and apply a query filter to your Cart based on selected value ranges

At the top of this page you can also:

  • Use the search bar to filter the elements displayed. This will not filter on the Size of Required columns
  • Download a copy of this definition in CSV format
  • Download a blank CSV submission template prepopulated with the correct structure header rows ready to fill with subject records and upload

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