TROMSO_SMO_CIGS

Variable CIGARETTES_T4 : Do you smoke cigarettes daily?

SAS code:
SMO_CIGS=CIGARETTES_T4;

If CIGARETTES_T4 EQ 1 then SMO_CIGS=2;

else if SMO_CIGS EQ . then SMO_CIGS=9;    

MORGAM_SMO_CIGS

The variable is similar to the MORGAM variable CIGS:

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 or regular and occasional smokers cannot be separated. For details of the deviations, see the MORGAM smoking data assessment .

HAPIEE_SMO_CIGS

Based on HAPIEE baseline variable l39, for current smoking:

"Do you smoke cigarettes?" 

1 "Yes, regularly, at least 1 cigarette a day"
2 "Yes, occasionally, less than 1 cigarette a day"  
3 "No, I smoked in the past but I stopped" 
4 "No, I have never smoked" 

Stata code 

replace l39=. if l39==.b
gen smo_cigs=0 if inlist(l39,3,4)
replace smo_cigs=1 if l39==2
replace smo_cigs=2 if l39==1
replace smo_cigs=9 if l39==.

ESTHER_SMO_CIGS

smo_cigs = cigs;
if smo_stat_daily in (1,2) and smo_cigs = . then smo_cigs = 0;
if smo_cigs = . then smo_cigs = 9;

Variable cigs is derived L42ZIGNU from participant's questionnaire at baseline. smo_stat_daily is a CHANCES variable.

EPIC_SMO_CIGS

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

EPIC var definition(s):
CIGARETT: Epic elderly variable showing currently smoke cigarettes (0=no, 1=yes)

N_CIGRET: Epic elderly variable showing number of cigarettes per week

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

Coding rule:
Variable SMO_CIGS shows whether the person is smoking cigarettes or cigarillos. Is equal to 0 if the person does not smoke cigarettes currently or the info is unavailable (CIGARETT=. or 0)

Is equal to 1 if the person is smoking cigarettes currently (CIGARETT=1) or the number of cigarettes per week is greater than 1 (N_CIGRET>=0 & N_CIGRET~=.).

Otherwise SMO_CIGS is coded as missing if smoking status is unavailable (SMOKE_ST=4) or the person is a daily smoker (SMO_STAT_DAILY=3) and the person is neither smoking cigar (SMO_CIGAR=0) nor cigarettes (SMO_CIGS=0) nor pipe (SMO_PIPE=0)

Coding rule in STATA:
-gen SMO_CIGS = 0 if CIGARETT==.

-replace SMO_CIGS = 0 if CIGARETT==0

-replace SMO_CIGS = 1 if CIGARETT==1

-replace SMO_CIGS = 1 if N_CIGRET>=0 & N_CIGRET~=.

-replace SMO_CIGS = 9 if SMOKE_ST==4

-replace SMO_CIGS= 9 if SMO_CIGAR==0 & SMO_CIGS==0 & SMO_PIPE==0 & SMO_STAT_DAILY==3