Table 1.

Study measures, survey items with responses, 2015 Comoros Global Youth Tobacco Survey (GYTS).

Study measure	GYTS survey items	GYTS item responses	Dichotomized measure
Dependent variable: current cigarette use	During the past 30 days, on how many days did you smoke cigarettes?	0 days 1 or 2 days 3 to 5 days 6 to 9 days 10 to 19 days 20 to 29 days All 30 days	No-0 days Yes-1 or more days
Current use of noncigarette tobacco products	During the past 30 days, did you use any form of smoked tobacco products other than cigarettes (such as cigar, pipe, water pipe, and shisha)?	Yes No	Yes No
	During the past 30 days, did you use any form of smokeless tobacco products (e.g., chewing tobacco, snuff, and dip)?	Yes No	Yes No
Independent variables
Age	How old are you?	11 years old or younger 12 years old 13 years old 14 years old 15 years old 16 years old 17 years old or older	≤12years 13-15 years ≥16 years
Sex	What is your sex?	Male Female	Male Female
Grade/form	In what grade/form are you?	6 eme 5 eme 4 eme 3 eme	6 eme 5 eme 4 eme 3 eme
Money to be spent on average week	During an average week, how much money do you have that you can spend on yourself, however you want?	I usually do not have any spending money Less than 500 Fr [500-1000] [1001-2500] [2501-5000] [5001-7500] [7501 and +	No money- I usually do not have any spending money Have money- any other responses for any of the remaining seven items
Parental smoking	How often do you see your father (stepfather or mother's partner) smoking in your home?	Do not have/do not see this person About every day Sometimes Never	No- do not have/do not see this person and never Yes- about every day and sometimes	No- no for both dichotomized items
	How often do you see your mother (stepmother or father's partner) smoking in your home	Do not have/do not see this person About every day Sometimes Never	No- do not have/do not see this person and never Yes- about every day and sometimes	Yes - for both dichotomized items
SHSb exposure in your home	During the past 7 days, on how many days has anyone smoked inside your home, in your presence?	0 days 1 to 2 days 3 to 4 days 5 to 6 days 7 days	No-0 days Yes-1 to 2 days 3 to 4 days 5 to 6 days 7 days
SHSb exposure outside home	During the past 7 days, on how many days has anyone smoked in your presence, inside any enclosed public place, other than your home (such as office, school, shops, restaurants, cinemas, and night club)?	0 days 1 to 2 days 3 to 4 days 5 to 6 days 7 days	No-0 days Yes-1 to 2 days 3 to 4 days 5 to 6 days 7 days	No- no for all three dichotomized items Yes - for all three dichotomized items
	During the past 7 days, on how many days has anyone smoked in your presence, inside any public transportation vehicles, such as trains, buses, or taxicabs?	I did not use public transportation during the past 7 days I used public transportation, but no one smoked in my presence 1 to 2 days 3 to 4 days 5 to 6 days 7 days	No- “I did not use public transportation during the past 7 days” and “I used public transportation, but no one smoked in my presence” Yes-1 to 2 days 3 to 4 days 5 to 6 days 7 days
	During the past 7 days, on how many days has anyone smoked in your presence, at any outdoor public place (such as playgrounds, sidewalks, entrances to buildings, parks, beaches, and vehicle)?	0 days 1 to 2 days 3 to 4 days 5 to 6 days 7 days	No-0 days Yes-1 to 2 days 3 to 4 days 5 to 6 days 7 days
Exposure to antismoking media messages	During the past 30 days, how many antismoking media messages (e.g., television, radio, billboards, posters, newspapers, magazines, and movies) have you seen?	Yes No	Yes No	No- no for both dichotomized items Yes - for both dichotomized items
Exposure to smoking media messages in the media	During the past 30 days, did you see any people using tobacco on TV, in videos, or in movies?	I did not watch TV, videos, or movies Yes No	Yes = “yes” No = “I did not watch TV, videos, or movies” and “no”
Favour toward smoking ban	Are you in favour of banning smoking inside enclosed public places (such as schools, shops, restaurants, supermarket, shopping centers, movie theaters, and youth homes ...)?	No Yes	No Yes
	Are you in favour of banning smoking at outdoor public places (such as stadium, public place, recreation areas, sidewalks, entrances to buildings, and beaches)?	No Yes	No Yes
Knowledge about harmful effects of SHS	Do you think the smoke from other people's cigarettes is harmful to you?	Definitely not Probably not Probably yes Definitely yes	No “definitely not” for both items Yes - any other responses For either item
Tobacco industry promotion	Do you have something (t-shirt, pen, backpack, etc.) with a cigarette brand logo on it?	No Yes	No Yes	No- no for both dichotomized items
	Has a cigarette representative ever offered you a free cigarette?	No Yes	No Yes	Yes - for both dichotomized items
Antismoking school education	During the past 12 months, were you taught in any of your classes about the dangers of tobacco use?	No I do not know Yes	No- no I do not know Yes- yes