Who are the Happy Girls? Gender Comparison Using a Biopsychosocial Approach: Health Behavior School-Aged Children Study in Portugal During Covid-Pandemic

From an ecological perspective, this study aimed to understand and characterize the similarities and differences between girls and boys regarding the perception of happiness. This paper is based on the Health Behaviour in School-aged Children (HBSC) 2022 study. 5809 students from 6th (29.6%), 8th (33.5%), and 10th (37%) grades responded, of whom 50.9% were female, with a mean age of 14.09 years (SD = 1.82). The results allow us to study and identify similarities and differences between four groups from an ecological perspective: happy girls, happy boys, unhappy girls, and unhappy boys. For both boys and girls, quality of life, low psychological symptoms, and body image best explain their well-being. Among unhappy girls, the mother's job, life satisfaction, health literacy, communication with the father, and relationship with teachers explain their well-being. In the case of unhappy boys, in addition to these variables, the father's job and the relationship with the family also explain their well-being.. Mental health factors, such as life satisfaction, quality of life, and low psychological symptoms, explain well-being in both boys and girls. For happy girls, age, mother's job, stress management, health literacy, and liking school explain their well-being. Happy boys report that not being so sad that they cannot stand it, not having worries, having a good relationship with teachers, and feeling safe in their living area contribute to their well-being. We conclude that unhappy adolescents are the ones who report more socioeconomic and family relationship difficulties, especially in communication with their fathers. Girls have weaker psychological health indicators and a more negative body image.