# Table 1 Independent variables derivation from survey data

Variable Survey question Original response options Recoded
Age How old are you? 11–18 years (coded categorically) N/A
Sex What is your sex 1 = male; 0 = female N/A
Anxiety During the past 12 months, how often have you been so worried about something that you could not sleep at night? 1 = never to 5 = always 1–3 = 0 and 4–5 = 1
Loneliness During the past 12 months, how often have you felt lonely? 1 = never to 5 = always 1–3 = 0 and 4–5 = 1
Suicidal Ideation During the past 12 months, did you ever seriously consider attempting suicide? Yes = 1; no = 2 Yes = 1 and no = 0
Suicidal plan During the past 12 months, did you make a plan about how you would attempt suicide? Yes = 1; no = 2 Yes = 1 and no = 0
Suicidal attempt During the past 12 months, how many times, did you actually attempted suicide 1 = 0 times to 5 = 6 times or more 1 = 0 and 2–5 = 1
School truancy During the past 30 days, how many days did you miss classes or school without permission? 1 = 0 days to 5 = 10 or more days 1 = 0 and 2–5 = 1
Bullied During the past 30 days, how many days were you bullied? 1 = 0 days to 7 = all 30 days 1–3 = 0 and 4–7 = 1
Physically attacked During the past 12 months, how many times were you physically attack? 1 = 0 times to 8 = 12 or more times 1 = 0 and 2–8 = 1
In a physical fight During the past 12 months, how many times were you in a physical fight? 1 = 0 times to 8 = 12 or more times 1 = 0 and 2–8 = 1
Hunger During the past 30 days, how often did you go hungry because there was not enough food in your home? 1 = never to 5 = always 1–3 = 0 and 4–5 = 1
Sexual risk behaviour During your life, with how many people have you ever had sexual intercourse 1 = never had intercourse to 7 = 6 or more people 1 = 0 and 2–7 = 1
Close friends How many close friends do you have? 1 = 0 friends to 4 = 3 or more close friend 1 = 0 and 2–4 = 1
Peer support During the past 30 days, how often were most of the students in your class kind and helpful? 1 = never to 5 = always 1–3 = 0 and 4–5 = 1
Current smoking of cigarette During the past 30 days, how many days did you smoke cigarette? 1 = 0 days to 7 = all 30 days 1 = 0 and 2–7 = 1
Parental tobacco use Which of your parents or guardian use any form of tobacco? 1 = never to 4 = both 1 = 0 and 2–4 = 1
Parental monitoring During the past 30 days, how often did your parents or guardians check to see if your homework was done? 1 = never to 5 = always 1–3 = 0 and 4–5 = 1
Parental understanding During the past 30 days, how often did your parents or guardians understand your problems and worries? 1 = never to 5 = always 1–3 = 0 and 4–5 = 1
Parental bonding During the past 30 days, how often did your parents or guardians really know what you were doing you’re your free time? 1 = never to 5 = always 1–3 = 0 and 4–5 = 1
Parental intrusion of privacy During the past 30 days, how often did your parents or guardians go through your things without your approval? 1 = never to 5 = always 1–3 = 0 and 4–5 = 1
Cannabis use During the past 30 days, how many times have you used marijuana (also called weed, Jah, Indian hemp, ahabammmono, and ganja)?” 1 = 0 days to 5 = All 30 days 1 = 0 and 2–5 = 1
Amphetamine During your life, how many times have you used amphetamine or methamphetamine (also called ice or yellow) 1 = 0 times to 5 = 20 or more times 1 = 0 and 2–5 = 1