Table 1 Questionnaire items (sample)

Q1 What is your school grade?

Q3 What is your sex?

Q4 How many siblings do you have?

Q8 How many friends do you have? (very many, many, not so many, very few, unknown)

Q10 How often do you feel happy? (always, often, sometimes, rarely, never)

Q11 How often do you feel well? (always, often, sometimes, rarely, never)

Q12 How often do you feel lonely? (always, often, sometimes, rarely, never)

Q13 How often do you talk with your family? (always, often, sometimes, rarely, never)

Q14 Have you ever experienced cyberbullying? (yes, no)

Q15 In the past year, have you seriously considered killing yourself? (no, sometimes, always, attempted suicide, no idea)

Q17 Do you have stressors about the following: body image; secondary sexual characteristics; friends; conventional bullying; parents; siblings; school records; opposite sex; sexual identity or intercourse; sexually transmitted infections; induced abortion; contraception; marriage; pregnancy, child care; physical illness; academic course; alcohol, smoking, or substance use?