Negative events
EVENTS
To measure the negative effects of the intervention on a universal sample of school students, we defined negative events as any significant unfavorable changes perceived by participants in their life and study, rather than solely as significant changes in their mental condition during the intervention period. Serious negative events were defined as mortality, hospitalization, suicide, or suicide attempts. Short questionnaires with open-ended questions were used to measure negative events. Data related to negative events was collected at the end of the intervention period (T1).