SENECA_PA_CYCLE

The original variables were based on intensity, time (hrs per day) and proportion (months per year). 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_CYCLE is based on SENECA variable CYCLING (“Cycling”) and HRSCYCL (“Hours per week cycling”)

IF CYCLING= 8 (“Irrelevant”) or 9 (“No answer/Don’t know”) or . THEN HRSCYCL=.;

IF CYCLING = 0 THEN HRSCYCL=0;

IF CYCLING = 1 THEN HRSCYCL= 0.25;

IF CYCLING = 2 THEN HRSCYCL= 0.75;

IF CYCLING = 3 THEN HRSCYCL= 1.5;

IF CYCLING = 4 THEN HRSCYCL= 2.5;

IF CYCLING = 5 THEN HRSCYCL= 3.5;

IF CYCLING = 6 THEN HRSCYCL= 4.5;

IF HRSCYCL =. THEN PA_CYCLE=.;

ELSE PA_CYCLE = (7 * HRSCYCL);

Contact round 2:

PA_CYCLE is based on SENECA variable CYCLING (“Cycling”) and FHRSCYCL (“Hours per week cycling”)

IF FHRSCYCL = 8.8, 9.9 or . THEN FHRSCYCL=.;

IF FHRSCYCL =. THEN PA_CYCLE=.;

ELSE PA_CYCLE = (FHRSCYCL);

Contact round 3:

PA_CYCLE is based on SENECA variable CYCLING (“Cycling”) and SHRSCYCL (“Hours per week cycling”)

IF SHRSCYCL =. THEN PA_CYCLE=.;

ELSE PA_CYCLE = (SHRSCYCL); 

EPIC_PA_CYCLE

Variable M_CYCL was used for the production of PA_CYCLE according to the following definition and rule.

EPIC var definition(s):
M_CYCL = METS cycling (is the mean of MS_CYCLE and MW_CYCLE)

Coding rule:
Variable PA_CYCLE shows hours per week cyckling .

Coding rule in STATA:
-gen PA_CYCLE = M_CYCL/6

-replace PA_CYCLE = 9999 if PA_CYCLE==.

NOTE: Variable M_CYCL was constructed as the mean of MS_CYCLE and MW_CYCLE (MS for summer cycling and MW for winter cycling and correspond the to METS for the hours per week spent in each cycling activity). The initial EPIC variables (HS_CYCLE and HW_CYCLE) corresponding to hours per week spent cycling were then multiplied by 6 (taking into account the average met hours value for all cycling activities).