SENECA_PA_WALK

Creation rule: Assign median value of each category of time to all subjects who fall within this category. For <0.5 assign 0.25 (median of 0 to 0.5) and for >4 hrs assign maximum of median value of those in EPIC Elderly and Zutphen with hrs/week >=4 (4.5).

Contact round 1:

PA_WALK is based on SENECA variable WALKING (“Hours spent on walking”)

IF WALKING IN(8,9,.) THEN HRSWALK = .;

IF WALKING = 0 THEN HRSWALK = 0;

IF WALKING = 1 THEN HRSWALK = 0.25;

IF WALKING = 2 THEN HRSWALK = 0.75;

IF WALKING = 3 THEN HRSWALK = 1.5;

IF WALKING = 4 THEN HRSWALK = 2.5;

IF WALKING = 5 THEN HRSWALK = 3.5;

IF WALKING = 6 THEN HRSWALK = 4.5;

IF HRSWALK =. THEN PA_WALK=.;

ELSE PA_WALK=(7 * HRSWALK);

Contact round 2:

PA_WALK is based on SENECA variables FHRSWLKA (“Hours/week walking, arm or hands”) and HRSWLKB (“Hours/week walking, body movements”).

IF FHRSWLKA  IN(8.8, 9.9, .) THEN HRSWALKA = .;

ELSE HRSWALKA = FHRSWLKA;

IF FHRSWLKB  IN(8.8, 9.9, .) THEN HRSWALKB = .;

ELSE HRSWALKB = FHRSWLKB;

IF (HRSWALKA =. AND HRSWALKB=.) THEN PA_WALK=.;

ELSE PA_WALK=SUM(HRSWALKA, HRSWALKB);

Contact round 3:

PA_WALK is based on SENECA variables SHRSWLKA (“Hours/week walking, arm or hands”) and SRSWLKB (“Hours/week walking, body movements”).

IF (SHRSWLKA =. AND SHRSWLKB=.) THEN PA_WALK=.;

ELSE PA_WALK=SUM(SHRSWLKA, SHRSWLKB);

CR_MORGAM_PRIME Belfast_PA_WALK

This variable is not harmonized in MORGAM, but some cohorts can convert it from their local data.

PRIME Belfast (UNK-BEL)

The PRIME Belfast variable “WOWALK: On a typical day at work, how much time do you spend walking? (do not include time spent going to and from work, spent lifting or carrying moderately heavy objects or very heavy objects)” was converted from minutes to hours by dividing by 60. Then in conjunction with the variable “WODAY: How many days to you work during a typical week?” we calculated hours/week walking at work.

Similar conversion rules were applied to “NOWOWALK: walking to and from work” and “LEWALK: leisure time walking” which are coded similar to above.

PA_WALK was not coded specifically as some participants were missing data for one or more of these walking variables, hence we could not simply add them together as it would not represent everyone fairly for total walking time in hours per week. We therefore have these individual walking variables available for us if requested and it is up to the investigator how they wish to use them.

EPIC_PA_WALK

Variable M_WALK was used for the production of PA_WALK according to the following definition and rule.

EPIC var definition(s):
M_WALK: Epic elderly Greece variable showing METS walking (is the mean of MS_WALK and MW_WALK)

Coding rule:
Variable PA_WALK shows hours per week of walking. 

Coding rule in STATA:
-gen PA_WALK = M_WALK/6

-replace PA_WALK = 9999 if PA_WALK==.

NOTE: Variable _M_WALK{} was constructed as the mean of_ MS_WALK and MW_WALK (MS for summer sports and MW for winter sports and correspond the to METS for the hours per week spent in each walking activity). The initial EPIC variables (HS_WALK and HW_WALK) corresponding to hours per week spent walking were then multiplied by 6 (taking into account the average met hours value for all walking activities).