Table 2.

Overview of the constructs and items in the Delphi questionnaire.

Questionnaire sections	Constructs	Items
Gender	Gender concepts	Current sex/gender identity Sex/gender roles Sex/gender expressions Sex/gender relations Sexuality (Sexual orientation)
	Gender approaches	Gender continuum Multidimensionality approach Multi-level approach Intersectionality approach Gender power relations Embodiment approach Decolonial lens
	Gender norms	General gender norms Gender norms linked to mental health
Mental health	Outcomes for adolescent mental health potentially affected by gender norms	Mental, social and physical well-being Depressiveness Connectedness Body image Self-efficacy Self-esteem Coping Self-control Sense of coherence Happiness Life purpose Self-harm Suicidal behavior Resilience Substance misuse Risky behavior
Social environment	Social environment levels important for adolescents’ gender norms	Individual level Interrelational level Community level National level Global level
	Social environment actors that shape the gender norms of adolescents	School environment (teachers, classmates etc.) Media (e.g., television, newspapers, movies) Social media (e.g., Tik-tok, Instagram) Peers/friends Family Sport groups Faith groups Healthcare providers Political parties Law enforcement Civil society Non-Profit-Organizations
	Individual competencies of adolescents to navigate gender norms	Coping skills Agency Navigation Interpersonal relationship skills Critical reflection skills Mental health literacy Respect and empathy for others