HomePC_Final

New in R7. Cleaned home postcode variable. Data either as entered on private network OR as cleaned postcode data (postcode format corrected) OR as derived from data provided OR as home postcode entered on form (in that order of priority).

Text

Home_Coord_Lat

New in R7. Home postcode as converted into latitude coordinate (with added noise) using Free Map Tools.

Real

Home_Coord_Long

New in R7. Home postcode as converted into longitude coordinate (with added noise) using Free Map Tools.

Real

HWCentre_Coord_Lat

New in R7. Centre point between home and work postcode was calculated. Noise was added to de-identify the data. The coordinates of this centre point were then split into two variables - Lat and Long

Real

HWCentre_Coord_Long

New in R7. Centre point between home and work postcode was calculated. Noise was added to de-identify the data. The coordinates of this centre point were then split into two variables - Lat and Long

Real

Hwcentre_Error

New in R7. Home-work PC centre error code generated during processing of postcode data.

Categorical

HWCentre_Radius_KM

New in R7.The distance in km between home and centre point of home-work PCs if both PCs are available but not the same. This data is different between data releases as random noise is added at time of calculation.

Real

WorkPC_CLerrorReason

New in R7. Of those with error code 99 204 PCs are estimated. They are marked as 1 in the PCder_WorkPC_Estimated variable.

Categorical

WorkPC_Clerror

New in R7. Error code assigned during cleaning of work postcode toi indicate why postcode is not complete.

Categorical

WorkPC_Est

New in R7. For all subjects with error code 99 in PCder_WorkPC_CleanErrorReason this variable indicates whether the work postcode has been estimated by the Physical activity team during data cleaning. If so the length of the road was used and the postcode was taken from the middle of the two end points.

Categorical

WorkPC_Final

New in R7. Cleaned work postcode variable. Data either as entered in study database OR as cleaned postcode data (postcode format corrected) OR as derived from data provided OR as work postcode entered on form (in that order of priority).

Text

Work_Coord_Lat

New in R7. Work postcode as converted into latitude coordinate (with added noise) using Free Map Tools.

Real

Work_Coord_Long

New in R7. Work postcode as converted into longitude coordinate (with added noise) using Free Map Tools.

Real