Relationship between Lifestyle and Self-Reported Smartphone Addiction in adolescents in the COVID-19 pandemic: A mixed-methods study()

OBJECTIVES: 1) To verify the association between Lifestyle and Self-Reported Smartphone Addiction in adolescents; and 2) to analyze the adolescents' perception of this relationship in the context of the COVID-19 pandemic. METHOD: A mixed-methods research study with a sequential and explanatory design, developed with Brazilian adolescents aged between 15 and 18 years old. In the first phase, a quantitative, observational and cross-sectional study was carried out with 479 participants and, in the second, a qualitative approach of an exploratory and descriptive nature, with 16 participants. RESULTS: An association was verified between Lifestyle and Self-Reported Smartphone Addiction by adolescents (p < 0.01), with a large size effect (d=0.98). All the domains related to lifestyle were associated with Self-Reported Smartphone Addiction, with greater effects evidenced in the following aspects: high effect for sleep, seat belt, stress and safe sex (d=0.85); and moderate effect for insight (d=0.74) and career (d=0.71). Subsequently, the qualitative analysis resulted in a category that describes how the adolescents understand this relationship in the face of the COVID-19 pandemic. CONCLUSION: More problematic lifestyles were evidenced among the adolescents classified as dependent. In addition to that, it was understood that the COVID-19 pandemic exerted a considerable impact on the lifestyle and behavior established by the adolescents with their smartphones. IMPLICATIONS FOR THE PRACTICE: Nurses and other health professionals are essential in the promotion of healthy lifestyles and adaptive behavior in smartphone use, especially in the face of this pandemic scenario and, thus, mitigating the harms to the adolescents' health.