AgeAtTest_DM_Attended

New in R8. Derived age at test in decimals to reflect true age (eg 35.9 instead of 35) at first visit in years and decimals. This variable replaces AgeAtTest_DM because that was calculated using AppDate. Since AppDate is the date the first visit is scheduled which is not always the date the visit took place. For AgeAtTest_DM_Attended the variable AppDate_Attended is used which is the actual date of the first visit. Please note that this is a decimal number which does not reflect months.

Years

Real

None

Phase 1 data. Age of phase 1 volunteer (a volunteer who has a phase 1 visit date) on 01 Aug 2014. This allows for coss-study population ages comparison

Real

None

Phase 2 data. Age of phase 2 volunteer (a volunteer who has a phase 2 visit date) on 01 Aug 2020. This allows for coss-study population ages comparison. age provided only if volunteer took part in phase 2

Real

AppDate_Attended

New for R8 and replaces AppDate. Date of the apppointment which the participant ACTUALLY attended so appointment status = 2. Where participant had 2 or more appointments with status 2 the most recent date has been entered here. This is different from the data in AppDate since this is the actual date and Appdate is the date is should have been had it not been cancelled. The AppDate variable should no longer be used in R8.

Day:Mon:Yr

Date

None

Year of birth of participant.

None

To be used for clustering particpants in age groups of 5 year blocks. Useful when data of birth can not be released.

G_AgeAtTest_Attended

New in R8. Calculated age of participant at first visit; rounded down to whole year. This variable replaces G_AgeAtTest

Sex of Participant

Participants gender as recorded in study database.

Categorical

None

To be used for clustering particpants in age groups of 10 year blocks. Useful when data of birth can not be released.