Table 1. Variables included in the study and their coding for analysis.

Response variable: tobacco smoking (TS)
Variables	Questions asked in the survey	Coding for analysis
Smoking cigarette, M901a	In the last 1 month, have you smoked cigarette? Options included: 1 = Yes, 2 = No	0 = Not using cigarette; 1 = Yes
Smoking bidi; M901b	In the last 1 month, have you smoked bidi? Options included: 1 = Yes, 2 = No	0 = Not using bidi; 1 = Yes
Prevalence of cigarette smoking (if yes), M903a	How many cigarettes do you smoke in a typical day? Option: 1 to 60 (in continuous form)	1 = 1–5 sticks daily; 2 = 6–10 sticks daily; 3 = 10+ sticks daily
Prevalence of bidi smoking (if yes), M905a	How many bidis do you smoke in a typical day? Option: 1 to 75 (in continuous form)	1 = 1–5 sticks daily; 2 = 6–10 sticks daily; 3 = 10+ sticks daily
Smoking cigarette/bidi; M901a, M901b	Whether respondent is currently smoking either cigarette or bidi. This variable is created by combining the response from M901a and M901b.	0 = No; 1 = Any one; 2 = Both cigarette and bidi

Note:

^#currently married or married at least once;

^*at least 11 years of education;

^¶Bangladeshi Taka and exchange rate is 78.11 BDT/USD;

^**quintiles based on principal component analysis.