TROMSO_SMO_NUMCIG

Variable CIGARETTES_NUMBER_MEAN_T4 : For previous or current smokers: How many cigarettes do you, or did you smoke daily? (Handrolled + factory made) - mean value.

Local variable explanation:

CIGARETTES_NUMBER_MEAN_T4 : For previous or current smokers: How many cigarettes do you, or did you smoke daily? (Handrolled + factory made) - mean value

SAS code:

IF SMO_STAT_DAILY in (1 2) then SMO_NUMCIG=0;

else if CIGARETTES_NUMBER_MEAN_T4 NOT IN (0 .) then SMO_NUMCIG=CIGARETTES_NUMBER_MEAN_T4;

else SMO_NUMCIG=9999;             

SHARE_SMO_NUMCIG

CR_SHARE_SMO_NUMCIG is derived from SHARE variable br006

BR006_ AVERAGE AMOUNT OF CIGARETTES PER DAY
How many cigarettes [do/did] [you/you] [smoke/smoke] on average per day?
___________ (0..120)

Asked only in wave 1 and 2.

MORGAM_SMO_NUMCIG

The SMO_NUMCIG variable is defined using the MORGAM variable NUMCIGS and the CHANCES variable SMO_STAT_DAILY:

If SMO_STAT_DAILY = 1 or 2, then SMO_NUMCIG=0.
If SMO_STAT_DAILY = 3 or 9, then:

In some MORGAM Centres, the local question(s) from which the MORGAM data was extracted deviated from the MORGAM question. E.g. in some cohorts, pipe and cigar smoking was included in the question. For details of the deviations, see the MORGAM smoking data assessment .

HAPIEE_SMO_NUMCIG

Based on HAPIEE baseline variable l40 for the number of cigarettes smoked per day in current and past smokers.  

Stata code

replace l40=. if l40==.c
gen smo_numcig=l40 
replace smo_numcig=0 if inlist(l39,3,4)
replace smo_numcig=9999 if l40==.

ESTHER_SMO_NUMCIG

smo_numcig = numcig;
if smo_numcig = . then smo_numcig = 9999;

Variable numcig is derived from L42ZIGNU in participant's questionnaire at baseline

EPIC_SMO_NUMCIG

The variables N_CIGRET, SMOKE_ST were used for the production of SMO_NUMCIG according to the following definition and rule.

EPIC var definition(s):

N_CIGRET: Epic elderly variable showing number of cigarettes smoked per week

SMOKE_ST: Epic elderly variable showing smoking status (1=never, 2=former, 3=smoker, 4=unknown)

Coding rule:
Variable SMO_NUMCIG shows number of cigarettes smoked per week. Is identical to N_CIGRET.

If the person has been a former (SMOKE_ST=2) or a non smoker (SMOKE_ST=1) then SMO_NUMCIG is equal to 0.

Otherwise SMO_NUMCIG is coded as missing (9999).

Coding rule in STATA:
-gen SMO_NUMCIG = N_CIGRET

-replace SMO_NUMCIG = 0 if SMOKE_ST==1 | SMOKE_ST==2

-recode SMO_NUMCIG .=9999