ALGAE Data Dictionary: Later life stage covariate data (algae5400-algae5404)

An automated protocol for assigning early life exposures to longitudinal cohort studies

ALGAE Data Dictionary: Later life stage covariate data (algae5400-algae5404)

by Kevin Garwood

Context of Variables

These variables describe administrative areas that study members occupied on the day they moved to a new location, as part of the later life analysis. They were produced by identifying the geocode used at start of a new address period and then mapping that to a set of administrative area codes. The codes allow epidemiologists to link these location records with covariate data that such as socio-economic levels.

Location of Result File

You will find these variables in a file having a name that fits the form: 
res_later_cov_[Date stamp].csv
which will be found in the directory: 
later_life/results/covariates

Example Result File

See here.

Variable Naming Conventions

The basic format of variables in this section follows this pattern: 
	algae54[00-05]_[pollution type]_[aggregate value]

In this pattern, algae54 indicates that they describe properties of life stages used in the later life analysis.

Variable Dictionary

Variable Description
algae5400_person_id An anonymised or pseudonymised identifier which represents a study member. ALGAE uses this variable to link data together for a given study member.
algae5401_mv_to_concept_days The number of days beginning at conception date and ending on the day of a move to a new address.
algae5402_ed91 The code for a UK district, taken from the UK 1991 census.
algae5403_oa2001 The code for a UK output area, taken from the UK 2001 census.
algae5404_coa2011 The code for a UK output area, taken from the UK 2011 census.